TYPO3 Core

In some cases the extension scanner produce a lot of CPU usage which results in a browser crash.
I can reproduce this by scanning the extension: bootstrap_package
After scanning the ~100 files the browser freeze and the CPU usage is too high.

See the video attached

The problem is the second extension in the scanner list, it contains 4468 files, the scanner now create for all files in all extensions one AJAX call, in my case 4700 AJAX calls are send to the web-server.

This has several impacts:

1) browser freezes
2) web server get under massiv load
3) WAF or iptables will take care of the "attac"