Blog | Web-Performance Blog

abusix.com – email reputation

Abusix.com is an email reputation service seemingly used by Swisscom. ℹ️ Maybe this article will be expanded someday if I had more touchpoints. The goal is not to introduce the service but to provide a glimpse into touchpoints with technology.
What I Learned with ChatGPT (OpenAI)

I enjoy utilizing ChatGPT from OpenAI, particularly its API, which significantly attracts me. The API’s cost-effective pricing is also quite enticing. I appreciate their official chat interface as well, and after a few months in December 2023, I started experimenting with GPT Plus, frequently using both GPTs and GPT-4. This page is neither a guide,…
Website Carbon calculator

You can find the Website Carbon Calculator here to try for yourself. This will give you a glimpse into your website’s eco-friendliness. But don’t be fooled, this check has a lot of limitations.
NCSC – Technical report DDoS

I compiled a summary of the report published by NSCSC. However, I found that the report remained rather basic and there weren’t many learnings for me.
web-performance.ch web tools

Debugging the internet or services on the internet can be a challenging task. I regularly need to perform debugging lookups for performance or security. I review lists of IP addresses after defending against attacks on a web property. All of these use cases need specialized tools. Here is a collection of tools I like and…
What i learned about Grok AI

As someone very interested in OpenAI’s ChatGPT, I wanted to test Grok. Currently, it’s only accessible to verified users of Twitter (aka X). It is possible to become verified with the Premium program, but it’s not that urgent for me. This blog post started in November 2023 and now in February 2025 it continues. Finally,…
Issues with AzureRmWebAppDeploment v230

We deploy from Azure DevOps YAML pipelines to Azure App Services. We use msdeploy packages for this. In calendar week 45 of 2023, we discovered issues in our deployment pipeline. The pipeline started failing unexpectedly in various places. The error message “ERROR_USER_NOT_AUTHORIZED_FOR_DEPLOYMENTPROVIDER” and details “Could not complete an operation with the specified provider (dbDacFx) when…
IIS App Pool to the “Performance Monitor Users”

Sitecore Error I am familiar with this error from working with Sitecore. However, you may encounter this error when running your own applications and experiencing difficulties accessing the performance counters in Windows.
PHP Cron Push Monitoring

I run a cron job every 5 minutes to execute background processes. Once they have successfully completed, I execute the following PHP function to verify their success and measure the execution time. If the execution fails, it sends me a push notification indicating that the push/heartbeat was not received within the expected timeframe. I monitor…
Loadtest Tools

There are many tools available, but not all are for the same purpose. I will collect here what I tend to use and build know-how on.