Depuis la dernière mise à jour, l'outils suppression est devenu très lent

What do you mean with slow? 

What do you try to do and how you do it?

I can't see this on my machine.

Please try to reset the preferences of Photoshop using the steps described here:

https://helpx.adobe.com/photoshop/using/preferences.html#reset-preferences

Please backup your settings before resetting the preferences. You can check:

https://helpx.adobe.com/photoshop/using/preferences.html#backup-photoshop-preferences

If this doesn't help check if your system is up-to-date. Do you have installed all recent updates and patches for the operating system and the device drivers, especially the graphic driver. If you have a NVidia graphic card installed, make sure that you are using the recent Studio version of the driver, not the Game Ready version.

Please provide a copy of your 'System Info'. This can be get from the Photoshop menu item Help > System Info. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.