This post is best viewed on a desktop with 1920x1080 or higher resolution. Flame graphs are an amazing tool to visualize the performance of software and I'll forever be grateful to Brendan Gregg for creating them. There is however one catch that you should be aware of though. They tend to hide small overheads that have a bigger overall impact very well. Let's look at a real example. The following flame graph shows a web worker under a very common CRUD operation - read one document from the datab...