en https://world.optimizely.com/blogs/stefan-holm-olsen/60Optimizely World https://stefanolsen.com/posts/turbocharge-your-strings-a-case-of-display-channels/ When doing a routine performance test, during a CMS 12 upgrade, I was able to achieve 95% performance improvement. Let's look at SearchValues with a simple case. https://stefanolsen.com/posts/turbocharge-your-strings-a-case-of-display-channels/ Sun, 14 Sep 2025 15:08:06 GMT Blog post https://stefanolsen.com/posts/send-away-outlook-autodiscover-request-the-easy-way/ If you also hate false errors in your request logs, let’s clean up one path at a time. Here is how to avoid logging 404 errors caused by Outlook. https://stefanolsen.com/posts/send-away-outlook-autodiscover-request-the-easy-way/ Mon, 21 Jul 2025 14:41:42 GMT Blog post https://stefanolsen.com/posts/my-key-take-aways-from-opticon-2023/ This past week I spent 4 days with Optimizely at Opticon 2023 in San Diego, and got to hear a lot of inspiring announcements and ideas. Here are my personal favorites. https://stefanolsen.com/posts/my-key-take-aways-from-opticon-2023/ Fri, 13 Oct 2023 05:48:56 GMT Blog post https://stefanolsen.com/posts/send-optimizely-notifications-with-sendgrid-api-not-smtp/ If your Optimizely site already sends transaction emails through an email platform API, why not do the same with Optimizely notification emails? https://stefanolsen.com/posts/send-optimizely-notifications-with-sendgrid-api-not-smtp/ Wed, 06 Sep 2023 20:00:00 GMT Blog post https://stefanolsen.com/posts/remember-to-configure-your-complementary-sendgrid-account-in-optimizely-dxp/ For all those who have websites in Optimizely DXP, consider improving email deliverability with SendGrid. There is a bonus tip at the end… https://stefanolsen.com/posts/remember-to-configure-your-complementary-sendgrid-account-in-optimizely-dxp/ Tue, 15 Aug 2023 17:00:00 GMT Blog post https://stefanolsen.com/posts/correlate-telemetry-for-scheduled-jobs-in-optimizely-cms/ Earlier I showed how to integrate Hangfire jobs with Application Insights, to correlate all job logging. Now you can do the same with regular Scheduled Jobs with this small trick. https://stefanolsen.com/posts/correlate-telemetry-for-scheduled-jobs-in-optimizely-cms/ Mon, 07 Aug 2023 18:30:00 GMT Blog post https://stefanolsen.com/posts/catalog-roots-can-finally-be-customized-in-optimizely-commerce/ Optimizely Commerce 14.13.0 removed a road block for customizing product catalog roots. Read here about how to use it. https://stefanolsen.com/posts/catalog-roots-can-finally-be-customized-in-optimizely-commerce/ Wed, 26 Jul 2023 20:00:00 GMT Blog post https://stefanolsen.com/posts/telemetry-correlation-for-scheduled-jobs-in-optimizely/ I previously demonstrated how to correlate telemetry to Azure Application Insights within a Hangfire job. But how about those jobs that are built as regular Optimizely scheduled jobs? Read about a solution here. https://stefanolsen.com/posts/telemetry-correlation-for-scheduled-jobs-in-optimizely/ Thu, 23 Mar 2023 19:30:00 GMT Blog post https://stefanolsen.com/posts/4-tips-and-tricks-for-hangfire-on-optimizely-cms/ Here are four useful tricks I always apply to any site where I use Hangfire (code included). https://stefanolsen.com/posts/4-tips-and-tricks-for-hangfire-on-optimizely-cms/ Tue, 21 Mar 2023 20:15:00 GMT Blog post https://stefanolsen.com/posts/performance-tip-use-good-old-contextcache-for-request-scoped-caching/ There is a less-known hidden gem in Optimizely CMS for brief request-scoped caching. Read about which it is and how simple it is to use. https://stefanolsen.com/posts/performance-tip-use-good-old-contextcache-for-request-scoped-caching/ Sat, 04 Mar 2023 21:17:39 GMT Blog post https://stefanolsen.com/posts/redis-pubsub-for-optimizely-cms-12-event-messaging/ I made a new Redis PubSub event provider for Optimizely, for use with load-balanced servers that cannot use my .NET sockets event provider. Read about it, and get it, here. https://stefanolsen.com/posts/redis-pubsub-for-optimizely-cms-12-event-messaging/ Thu, 02 Mar 2023 16:25:20 GMT Blog post https://stefanolsen.com/posts/performance-tip-disable-arr-affinity-sticky-sessions-in-dxp/ If you are working with Optimizely DXP sites, take a few minutes to consider whether you really need sticky sessions. Here is how to disable them and what happens after. https://stefanolsen.com/posts/performance-tip-disable-arr-affinity-sticky-sessions-in-dxp/ Fri, 24 Feb 2023 18:15:29 GMT Blog post https://stefanolsen.com/posts/performance-tip-dont-get-a-shopping-cart-until-you-need-one/ For all of you that work on sites with mini-carts, here is a performance tip for Optimizely Customized Commerce. https://stefanolsen.com/posts/performance-tip-dont-get-a-shopping-cart-until-you-need-one/ Mon, 19 Dec 2022 07:00:10 GMT Blog post https://stefanolsen.com/posts/hosting-optimizely-cms-12-on-docker-engine/ Since Optimizely CMS can now be deployed as a Docker container, here is a demonstration of building, running and scaling an Optimizely CMS 12 site on a Docker Engine swarm. https://stefanolsen.com/posts/hosting-optimizely-cms-12-on-docker-engine/ Sun, 04 Dec 2022 18:35:53 GMT Blog post https://stefanolsen.com/posts/7-ways-to-deploy-optimizely-cms-12-.net-6 With Optimizely CMS 12 now fully multi-platform, it can now be hosted in new ways. Here is a quick walkthrough of some of the hosting models. https://stefanolsen.com/posts/7-ways-to-deploy-optimizely-cms-12-.net-6 Mon, 05 Sep 2022 16:30:00 GMT Blog post https://stefanolsen.com/posts/new-optimizely-cms-event-provider-for-on-premise-hosting/ There is a new event provider for the Optimizely CMS 12+ platform, for use in on-premise hosting scenarios. It is simple and efficient. https://stefanolsen.com/posts/new-optimizely-cms-event-provider-for-on-premise-hosting/ Mon, 11 Apr 2022 06:00:00 GMT Blog post https://stefanolsen.com/posts/remember-to-flush-application-insights-on-shutdown/ Here is how to ensure that Azure Application Insights logs and performance are not lost on shutdown, all while also optimizing log collection. https://stefanolsen.com/posts/remember-to-flush-application-insights-on-shutdown/ Sat, 28 Nov 2020 08:30:00 GMT Blog post https://stefanolsen.com/posts/compressing-web-api-and-episerver-api-responses/ If you return large responses from your custom Web APIs or from Episerver Content and Service APIs, you might want to remember about response compression. Read here about enabling it. https://stefanolsen.com/posts/compressing-web-api-and-episerver-api-responses/ Thu, 29 Oct 2020 19:30:00 GMT Blog post https://stefanolsen.com/posts/5-things-to-consider-when-integrating-native-apps-with-episerver/ From working on Episerver solutions with native apps, I have done several learnings on challenges, limitations and solutions. In this blog post, I list up five of them. https://stefanolsen.com/posts/5-things-to-consider-when-integrating-native-apps-with-episerver/ Mon, 15 Jun 2020 11:00:00 GMT Blog post https://stefanolsen.com/posts/burst-protecting-pages-with-cloudflare-output-caching/ This is the story about how an Episerver site achieved extreme performance for some landing pages, by applying distributed output caching using Episerver DXC and Cloudflare. https://stefanolsen.com/posts/burst-protecting-pages-with-cloudflare-output-caching/ Sat, 18 Apr 2020 08:00:00 GMT Blog post