{"id":2605,"date":"2026-03-29T16:58:56","date_gmt":"2026-03-29T16:58:56","guid":{"rendered":"https:\/\/lightgreen-wombat-810778.hostingersite.com\/?page_id=2605"},"modified":"2026-04-27T17:27:40","modified_gmt":"2026-04-27T17:27:40","slug":"web-application-performance","status":"publish","type":"page","link":"https:\/\/www.castelis.com\/en\/infrastructure\/web-application-performance\/","title":{"rendered":"Web &amp; application performance"},"content":{"rendered":"<section class=\"castelis-hero-banner\" >\n            <div class=\"hero-image-bg\">\n            <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2026\/04\/Dev-sur-mesure1-e1775427748439.webp\" alt=\"Web &amp; application performance\">\n        <\/div>\n    \n    <div class=\"container\">\n                        <div class=\"hero-content-wrapper\">\n            <div class=\"hero-content\">\n                                    <h1 class=\"hero-title\">Web &amp; application performance<\/h1>\n                \n                                    <div class=\"hero-description\">\n                        <p>The technical performance of your web applications and digital platforms conditions user experience quality, operational stability, and business effectiveness. We analyse, measure, and optimise your environments to guarantee speed, reliability, and scalability.<\/p>\n\n                    <\/div>\n                \n                                    <div class=\"hero-cta-buttons\">\n                        <a href=\"#contact\" class=\"btn btn-primary\">\n                            <i class=\"fas fa-chevron-right\"><\/i>\n                            <span> Talk to an expert <\/span>\n                        <\/a>\n\n                                            <\/div>\n                \n                            <\/div>\n        <\/div>\n\n        \n            <\/div>\n<\/section>\n\n\n<nav class=\"castelis-toc \"  data-toc-id=\"toc-69f0ad696e68d\">\n    <div class=\"container\">\n        <div class=\"toc-wrapper\">\n                            <ul class=\"toc-list\">\n                                                                        <li class=\"toc-item\">\n                                <a href=\"#expertise\" class=\"toc-link\">\n                                    Expertise\n                                <\/a>\n                            <\/li>\n                                                                                                <li class=\"toc-item\">\n                                <a href=\"#methodologie\" class=\"toc-link\">\n                                    Methodology\n                                <\/a>\n                            <\/li>\n                                                                                                <li class=\"toc-item\">\n                                <a href=\"#tech-stack\" class=\"toc-link\">\n                                    Tech stack\n                                <\/a>\n                            <\/li>\n                                                                                                <li class=\"toc-item\">\n                                <a href=\"#garanties\" class=\"toc-link\">\n                                    Commitments\n                                <\/a>\n                            <\/li>\n                                                                                                <li class=\"toc-item\">\n                                <a href=\"#faq\" class=\"toc-link\">\n                                    FAQ\n                                <\/a>\n                            <\/li>\n                                                                                                <li class=\"toc-item\">\n                                <a href=\"#contact\" class=\"toc-link\">\n                                    Contact\n                                <\/a>\n                            <\/li>\n                                                            <\/ul>\n                    <\/div>\n    <\/div>\n<\/nav>\n\n<section class=\"castelis-cards-panel alignment-vertical bg-black heading-left\"  id=\"expertise\" >\n    <div class=\"container\">\n                    <div class=\"cards-panel-header\">\n                                    <div class=\"cards-panel-heading\">\n                        <span class=\"slash-prefix\">\/<\/span>\n                        <h2>Monitoring &amp; optimisation<\/h2>\n                    <\/div>\n                                \n                                    <div class=\"cards-panel-description\">\n                        <p>Castelis monitors the availability of your applications and improves the user experience. We analyse your tools to optimise rendering, streamline user journeys, and experience navigation as your users do.<\/p>\n\n                    <\/div>\n                            <\/div>\n                \n                    <div class=\"cards-grid cards-grid-3\">\n                                    <div class=\"card-item\">\n                                                    \n                            <div class=\"card-icon\">\n                                                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-3.svg\" alt=\"Browser monitoring\" \/>\n                                                            <\/div>\n                            \n                                                            <h3 class=\"card-title\">Browser monitoring<\/h3>\n                                                        \n                                                            <p class=\"card-description\">Real-time analysis of pages viewed in the browser to identify friction points and improve the user journey.<\/p>\n                                                        \n                                                        \n                                                                        <\/div>\n                                    <div class=\"card-item\">\n                                                    \n                            <div class=\"card-icon\">\n                                                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-3.svg\" alt=\"Load testing\" \/>\n                                                            <\/div>\n                            \n                                                            <h3 class=\"card-title\">Load testing<\/h3>\n                                                        \n                                                            <p class=\"card-description\">Simulation of complex scenarios and load tests to guarantee the performance and availability of your applications.<\/p>\n                                                        \n                                                        \n                                                                        <\/div>\n                                    <div class=\"card-item\">\n                                                    \n                            <div class=\"card-icon\">\n                                                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-3.svg\" alt=\"Log management\" \/>\n                                                            <\/div>\n                            \n                                                            <h3 class=\"card-title\">Log management<\/h3>\n                                                        \n                                                            <p class=\"card-description\">Log collection and processing to diagnose and anticipate problems before they impact users.<\/p>\n                                                        \n                                                        \n                                                                        <\/div>\n                                    <div class=\"card-item\">\n                                                    \n                            <div class=\"card-icon\">\n                                                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-3.svg\" alt=\"Manual &amp; automated QA\" \/>\n                                                            <\/div>\n                            \n                                                            <h3 class=\"card-title\">Manual &amp; automated QA<\/h3>\n                                                        \n                                                            <p class=\"card-description\">Implementation of manual and automated tests, web and mobile, to ensure the functional and technical reliability of applications.<\/p>\n                                                        \n                                                        \n                                                                        <\/div>\n                                    <div class=\"card-item\">\n                                                    \n                            <div class=\"card-icon\">\n                                                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-3.svg\" alt=\"Database optimisation\" \/>\n                                                            <\/div>\n                            \n                                                            <h3 class=\"card-title\">Database optimisation<\/h3>\n                                                        \n                                                            <p class=\"card-description\">Analysis and improvement of slow queries to guarantee optimal back-end performance.<\/p>\n                                                        \n                                                        \n                                                                        <\/div>\n                                    <div class=\"card-item\">\n                                                    \n                            <div class=\"card-icon\">\n                                                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-3.svg\" alt=\"APM management\" \/>\n                                                            <\/div>\n                            \n                                                            <h3 class=\"card-title\">APM management<\/h3>\n                                                        \n                                                            <p class=\"card-description\">Deployment and supervision of APM tools to continuously monitor and improve application performance.<\/p>\n                                                        \n                                                        \n                                                                        <\/div>\n                            <\/div>\n            <\/div>\n<\/section>\n\n\n<section class=\"castelis-methodology-timeline\"  id=\"methodologie\" >\n    <div class=\"container\">\n                    <h2 class=\"methodology-heading\">\n                <span class=\"slash-prefix\">\/<\/span>\n                Our approach\n            <\/h2>\n        \n        <div class=\"methodology-content\">\n            \n            <div class=\"methodology-left \">   \n                                    <div class=\"methodology-subheading\">\n                        <p>By combining analysis and action plans, we optimise your applications to engage and retain users while improving the overall experience.<\/p>\n\n                    <\/div>\n                                                    <div class=\"timeline-wrapper\">\n                        <div class=\"timeline-line\"><\/div>\n                        \n                                                    <div class=\"timeline-step\">\n                                <div class=\"timeline-step-number\">\n                                    <span>1<\/span>\n                                <\/div>\n                                \n                                <div class=\"timeline-step-content\">\n                                                                            <h3 class=\"timeline-step-title\">Initial audit<\/h3>\n                                                                        \n                                                                            <p class=\"timeline-step-description\">Comprehensive analysis of applications and sites to identify critical performance bottlenecks.<\/p>\n                                                                        \n                                                                            <div class=\"timeline-step-tags\">\n                                                                                            <span class=\"timeline-tag\">Audit<\/span>\n                                                                                            <span class=\"timeline-tag\">Diagnostic<\/span>\n                                                                                    <\/div>\n                                                                    <\/div>\n                            <\/div>\n                                                    <div class=\"timeline-step\">\n                                <div class=\"timeline-step-number\">\n                                    <span>2<\/span>\n                                <\/div>\n                                \n                                <div class=\"timeline-step-content\">\n                                                                            <h3 class=\"timeline-step-title\">Action plan<\/h3>\n                                                                        \n                                                                            <p class=\"timeline-step-description\">Development of technical and functional recommendations for each identified issue.<\/p>\n                                                                        \n                                                                            <div class=\"timeline-step-tags\">\n                                                                                            <span class=\"timeline-tag\">Recommendations<\/span>\n                                                                                            <span class=\"timeline-tag\">Priorities<\/span>\n                                                                                    <\/div>\n                                                                    <\/div>\n                            <\/div>\n                                                    <div class=\"timeline-step\">\n                                <div class=\"timeline-step-number\">\n                                    <span>3<\/span>\n                                <\/div>\n                                \n                                <div class=\"timeline-step-content\">\n                                                                            <h3 class=\"timeline-step-title\">Implementation<\/h3>\n                                                                        \n                                                                            <p class=\"timeline-step-description\">Deployment of optimisations, tests, and adjustments in line with market standards.<\/p>\n                                                                        \n                                                                            <div class=\"timeline-step-tags\">\n                                                                                            <span class=\"timeline-tag\">Optimisation<\/span>\n                                                                                            <span class=\"timeline-tag\">Tests<\/span>\n                                                                                    <\/div>\n                                                                    <\/div>\n                            <\/div>\n                                                    <div class=\"timeline-step\">\n                                <div class=\"timeline-step-number\">\n                                    <span>4<\/span>\n                                <\/div>\n                                \n                                <div class=\"timeline-step-content\">\n                                                                            <h3 class=\"timeline-step-title\">Continuous monitoring<\/h3>\n                                                                        \n                                                                            <p class=\"timeline-step-description\">Real-time performance tracking and strategic adjustments to maintain a high level of performance.<\/p>\n                                                                        \n                                                                            <div class=\"timeline-step-tags\">\n                                                                                            <span class=\"timeline-tag\">Monitoring<\/span>\n                                                                                            <span class=\"timeline-tag\">Performance<\/span>\n                                                                                    <\/div>\n                                                                    <\/div>\n                            <\/div>\n                                            <\/div>\n                \n                            <\/div>\n\n            \n                    <\/div>\n    <\/div>\n<\/section>\n\n\n<section class=\"castelis-tech-stack\"  id=\"tech-stack\" >\n    <div class=\"container\">\n                    <h2 class=\"tech-stack-heading\">\n                <span class=\"slash-prefix\">\/<\/span>\n                Technologies used\n            <\/h2>\n        \n                    <div class=\"tech-stack-description\">\n                <p>We use the best technologies adapted to your constraints to ensure optimal performance and precise application monitoring.<\/p>\n\n            <\/div>\n        \n                    <div class=\"tech-stack-tools\">\n                                                            <span class=\"tech-tool\">New Relic<\/span>\n                                                                                <span class=\"tech-tool\">Cloudflare<\/span>\n                                                                                <span class=\"tech-tool\">Katalon<\/span>\n                                                                                <span class=\"tech-tool\">Centreon<\/span>\n                                                                                <span class=\"tech-tool\">Splunk<\/span>\n                                                                                <span class=\"tech-tool\">Kibana<\/span>\n                                                <\/div>\n        \n                    <div class=\"tech-stack-info\">\n                                    <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/Icon-6.svg\" alt=\"Icon\" class=\"info-icon\">\n                                <span class=\"info-text\">Custom stack tailored to your constraints and business needs.<\/span>\n            <\/div>\n        \n            <\/div>\n<\/section>\n\n\n<section class=\"castelis-content-image frame-black\"  id=\"garanties\" >\n    <div class=\"container align-items-center\"> \n        \n        <div class=\"order-2 content-wrapper \">\n            \n                            <h2 class=\"content-title\">\n                    <span class=\"slash-prefix\">\/<\/span>\n                    <div>Our commitments<\/div>\n                <\/h2>\n                        \n                            <div class=\"castelis-content-text\">\n                    <p>Castelis guarantees continuous and proactive monitoring of your applications and websites, targeted optimisations, and a tangible improvement in user experience.<\/p>\n<p>Our methods combine technical expertise and rigorous testing to deliver measurable, lasting results.<\/p>\n\n                <\/div>\n                        \n                    <\/div>\n        \n        \n        <div class=\"order-1 image-style-framed \">\n                            <img decoding=\"async\" \n                    src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2026\/04\/christina-wocintechchat-com-m-6Dv3pe-JnSg-unsplash.webp\" \n                    alt=\"Our commitments\"\n                \/>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n<section class=\"castelis-faq\"  id=\"faq\" >\n    <div class=\"container\">\n        <h2 class=\"faq-title\">\n            <span class=\"slash-prefix\">\/<\/span>\n            <div>Frequently asked questions, application performance<\/div>\n        <\/h2>\n    <\/div>\n        \n            <div class=\"faq-accordion\">\n                                            \n                <div class=\"faq-item active\">\n                    <div class=\"container\">\n                        <button \n                            class=\"faq-question\" \n                            type=\"button\"\n                            aria-expanded=\"true\"\n                            aria-controls=\"faq-faq-0\"\n                            onclick=\"this.closest('.faq-item').classList.toggle('active'); this.setAttribute('aria-expanded', this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true');\"\n                        >\n                            <h3>What types of performance tests do you carry out?<\/h3>\n                            <i class=\"faq-icon\"><\/i>\n                        <\/button>\n                    <\/div>\n                    <div \n                        class=\"faq-answer\" \n                        id=\"faq-faq-0\"\n                        role=\"region\"\n                    >\n                        <div class=\"container\">\n                            <div class=\"faq-answer-content\">\n                                <p>We carry out load tests, stress tests, complex scenario simulations, and UX\/UI tests to identify friction points and guarantee smooth application performance.<\/p>\n\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                                            \n                <div class=\"faq-item \">\n                    <div class=\"container\">\n                        <button \n                            class=\"faq-question\" \n                            type=\"button\"\n                            aria-expanded=\"false\"\n                            aria-controls=\"faq-faq-1\"\n                            onclick=\"this.closest('.faq-item').classList.toggle('active'); this.setAttribute('aria-expanded', this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true');\"\n                        >\n                            <h3>How do you monitor performance after optimisation?<\/h3>\n                            <i class=\"faq-icon\"><\/i>\n                        <\/button>\n                    <\/div>\n                    <div \n                        class=\"faq-answer\" \n                        id=\"faq-faq-1\"\n                        role=\"region\"\n                    >\n                        <div class=\"container\">\n                            <div class=\"faq-answer-content\">\n                                <p>Using monitoring and APM tools, we continuously track application availability and responsiveness to anticipate any user impact.<\/p>\n\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                                            \n                <div class=\"faq-item \">\n                    <div class=\"container\">\n                        <button \n                            class=\"faq-question\" \n                            type=\"button\"\n                            aria-expanded=\"false\"\n                            aria-controls=\"faq-faq-2\"\n                            onclick=\"this.closest('.faq-item').classList.toggle('active'); this.setAttribute('aria-expanded', this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true');\"\n                        >\n                            <h3>How often are reports generated?<\/h3>\n                            <i class=\"faq-icon\"><\/i>\n                        <\/button>\n                    <\/div>\n                    <div \n                        class=\"faq-answer\" \n                        id=\"faq-faq-2\"\n                        role=\"region\"\n                    >\n                        <div class=\"container\">\n                            <div class=\"faq-answer-content\">\n                                <p>Reports are generated according to your needs, with regular monitoring and concrete improvement recommendations to maintain optimal performance.<\/p>\n\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                                            \n                <div class=\"faq-item \">\n                    <div class=\"container\">\n                        <button \n                            class=\"faq-question\" \n                            type=\"button\"\n                            aria-expanded=\"false\"\n                            aria-controls=\"faq-faq-3\"\n                            onclick=\"this.closest('.faq-item').classList.toggle('active'); this.setAttribute('aria-expanded', this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true');\"\n                        >\n                            <h3>Do you work across all platforms?<\/h3>\n                            <i class=\"faq-icon\"><\/i>\n                        <\/button>\n                    <\/div>\n                    <div \n                        class=\"faq-answer\" \n                        id=\"faq-faq-3\"\n                        role=\"region\"\n                    >\n                        <div class=\"container\">\n                            <div class=\"faq-answer-content\">\n                                <p>Yes, we work on websites, business applications, and mobile applications, adapting tests and monitoring tools to each environment.<\/p>\n\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                    <\/div>\n    <\/section>\n\n\n<section class=\"castelis-contact-form\"  id=\"contact\" >\n    <div class=\"container\">   \n                    <div class=\"contact-tag hashtag-title\">CONTACT<\/div>\n        \n                    <h2 class=\"contact-heading\">Let\u2019s talk about your project<\/h2>\n        \n        \n        <div class=\"contact-wrapper\">\n            \n            <div class=\"contact-form-side\">\n                                    <div class=\"contact-form-container\">\n                        \n\t\t\t\t\t\t<script>\n\t\t\t\t\t\t\twindow.hsFormsOnReady = window.hsFormsOnReady || [];\n\t\t\t\t\t\t\twindow.hsFormsOnReady.push(()=>{\n\t\t\t\t\t\t\t\thbspt.forms.create({\n\t\t\t\t\t\t\t\t\tportalId: 9318812,\n\t\t\t\t\t\t\t\t\tformId: \"312183e0-8b6c-488d-ac79-af4a4fbc82fe\",\n\t\t\t\t\t\t\t\t\ttarget: \"#hbspt-form-1777380713000-2763062955\",\n\t\t\t\t\t\t\t\t\tregion: \"na1\",\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t})});\n\t\t\t\t\t\t<\/script>\n\t\t\t\t\t\t<div class=\"hbspt-form\" id=\"hbspt-form-1777380713000-2763062955\"><\/div>\n                    <\/div>\n                            <\/div>\n\n            \n            <div class=\"contact-sidebar\">\n                <div class=\"sidebar-content\">\n                                            <h3 class=\"sidebar-heading\">Why choose us?<\/h3>\n                    \n                                            <div class=\"reasons-list\">\n                                                            <div class=\"reason-item\">\n                                    <i class=\"green-icon-bg\"><\/i>\n                                    <div class=\"reason-content\">\n                                        <h4 class=\"reason-title\">Technical expertise<\/h4>\n                                        <div class=\"reason-description\">15+ years of experience, AWS\/Azure certifications, modern stack<\/div>\n                                    <\/div>\n                                <\/div>\n                                                            <div class=\"reason-item\">\n                                    <i class=\"green-icon-bg\"><\/i>\n                                    <div class=\"reason-content\">\n                                        <h4 class=\"reason-title\">Proven method<\/h4>\n                                        <div class=\"reason-description\">100+ projects delivered, 95% client satisfaction, deadlines met<\/div>\n                                    <\/div>\n                                <\/div>\n                                                            <div class=\"reason-item\">\n                                    <i class=\"green-icon-bg\"><\/i>\n                                    <div class=\"reason-content\">\n                                        <h4 class=\"reason-title\">Ongoing support<\/h4>\n                                        <div class=\"reason-description\">TMA available, team training, 24\/7 monitoring<\/div>\n                                    <\/div>\n                                <\/div>\n                                                    <\/div>\n                    \n                                            <div class=\"satisfaction-rating\">\n                            <div class=\"rating-display\">\n                                <div class=\"rating-label\">Satisfaction score<\/div>\n                                <div class=\"rating-number\">4.8\/5<\/div>\n                            <\/div>\n                            <div class=\"rating-stars\">\n                                                                                                            <i class=\"fas fa-star\"><\/i>\n                                                                                                                                                <i class=\"fas fa-star\"><\/i>\n                                                                                                                                                <i class=\"fas fa-star\"><\/i>\n                                                                                                                                                <i class=\"fas fa-star\"><\/i>\n                                                                                                                                                <i class=\"fas fa-star-half-alt\"><\/i>\n                                                                                                <\/div>\n                                                    <\/div>\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n            <div class=\"contact-form-image\">\n            <img decoding=\"async\" src=\"https:\/\/www.castelis.com\/wp-content\/uploads\/2025\/12\/designer-working-3d-model-2.png\" alt=\"\" \/>\n        <\/div>\n    <\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":2529,"parent":2578,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"class_list":["post-2605","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/pages\/2605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/comments?post=2605"}],"version-history":[{"count":2,"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/pages\/2605\/revisions"}],"predecessor-version":[{"id":2607,"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/pages\/2605\/revisions\/2607"}],"up":[{"embeddable":true,"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/pages\/2578"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/media\/2529"}],"wp:attachment":[{"href":"https:\/\/www.castelis.com\/en\/wp-json\/wp\/v2\/media?parent=2605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}