Big source / minified files make Chrome Developer Tools freeze

For me blackboxing is not working also. Helps only:

1. Kill Chrome process that eats CPU (developer tools will be closed)
2. Open any website without huge source files (e.g. ya.ru)
3. Switch source tab to another
4. Open Developer Tools on the target website (and do not switch to source tab)

Also I do not have this problem on Chrome Canary

This is a known bug: Chromium Bug Tracker - Issue 593679 - [REGRESSION] DevTools: Big sources hang the Developer Tools, and it's currently fixed, but not available on regular/stable Google Chrome or Chromium.

The temporary solution is to use Chrome Canary.