Why is the "Quick Selection Tool" working so slowly? - Photoshop CC in Windows 7

[evaxebra]

Every time I try to use the Quick selection tool, it takes a REALLY long time to select. I had CS5 and it was super fast, even with large RAW files. Now with CC, it takes at least 20 minutes to select a person out of a photo.

I already tried "resetting" the tool - that did not work at all.

Please help!

[shanksmyster]

I have changed the settings using some of the above suggestions but nothing has worked for me. I recently updated from Photoshop 2014 CC to 2015 CC. I am on a Mac with 4gb ram and 2.66 Dual Core Processor, but never had quick selection behaving so slow until I updated. My current settings are cache level and history 6, tile 1024k, and I have restarted photoshop.

[Acufocal]

I'm having this problem and it even extends to certain selections made through other methods. I've done all of the advice in this thread and nothing has fixed it.

[Danette5]

You are my hero shootmyphoto.com  Worked like a charm!!!

[dough45957423]

I'm on a Mac, and simply changing the cache size from 1 to 4, (as previously suggested), was the solution. I re-booted PS and the tool Quick Selection tool began working normally (fast) again.

[JohnVo]

hi

i have clicked to big & fat , photoshop set cache at 6 and 1024K

after i set the cache to 4

i can't notice any differents between 4 and 6

which is the right value?

what do you use 4 or 6?

thanks

[defaultois6hv8vxoz6]

Although this reply is majorly late, I only started to play around with photoshop recently. I haven't seen it mentioned anywhere but while looking for a solution to this problem I came up with one of my own. I have an older slower computer that is still strong enough for doing a lot of the things I do but I noticed with higher resolution images that I've scanned in act up in the same way when trying to do a selection...

My solution is to make a duplicate copy of whatever you are working with or a stamped layer, convert it to a smart object, enter the smart object and reduce the resolution, then just remove anything you don't want to select save it and go back to the original and just ctrl-click the smart object to transfer the selection...

I know it's late but if I'm reading this today it might help someone else in the same boat 😉