Blog posts by Stefan Holm Olsen2025-09-14T15:08:06.0000000Zhttps://world.optimizely.com/blogs/stefan-holm-olsen/ Optimizely World Turbocharge your strings - a case of display channelsWhen 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.2025-09-14T15:08:06.0000000ZBlog post Send away Outlook Autodiscover request the easy wayIf 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.2025-07-21T14:41:42.0000000ZBlog post My key take-aways from Opticon 2023This 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.2023-10-13T05:48:56.0000000ZBlog post Send Optimizely notifications with SendGrid API, not SMTPIf your Optimizely site already sends transaction emails through an email platform API, why not do the same with Optimizely notification emails?2023-09-06T20:00:00.0000000ZBlog post 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…2023-08-15T17:00:00.0000000ZBlog post Correlate telemetry for scheduled jobs in Optimizely CMSEarlier 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.2023-08-07T18:30:00.0000000ZBlog post 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.2023-07-26T20:00:00.0000000ZBlog post Telemetry correlation for Scheduled Jobs in OptimizelyI 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.2023-03-23T19:30:00.0000000ZBlog post 4 tips and tricks for Hangfire on Optimizely CMSHere are four useful tricks I always apply to any site where I use Hangfire (code included).2023-03-21T20:15:00.0000000ZBlog post Performance tip: Use good old ContextCache for request-scoped cachingThere 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.2023-03-04T21:17:39.0000000ZBlog post 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.2023-03-02T16:25:20.0000000ZBlog post Performance tip: Disable sticky sessions in Optimizely DXPIf 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.2023-02-24T18:15:29.0000000ZBlog post Performance tip: Don’t get a shopping cart until you need oneFor all of you that work on sites with mini-carts, here is a performance tip for Optimizely Customized Commerce.2022-12-19T07:00:10.0000000ZBlog post Hosting Optimizely CMS 12 on Docker EngineSince 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.2022-12-04T18:35:53.0000000ZBlog post 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.2022-09-05T16:30:00.0000000ZBlog post New Optimizely CMS event provider for on-premise hostingThere is a new event provider for the Optimizely CMS 12+ platform, for use in on-premise hosting scenarios. It is simple and efficient.2022-04-11T06:00:00.0000000ZBlog post 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.2020-11-28T08:30:00.0000000ZBlog post Compressing Web API and Episerver API responsesIf 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.2020-10-29T19:30:00.0000000ZBlog post 5 things to consider when integrating native apps with EpiserverFrom 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.2020-06-15T11:00:00.0000000ZBlog post Burst-protecting pages with Cloudflare output cachingThis 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.2020-04-18T08:00:00.0000000ZBlog post