This conversation has been merged. Please reference the main conversation: Photoshop CC: Keeps crashing on Save & Save As
Yesterday, experienced a specific file which would consistently cause my Photoshop CC to crash on save. The usual workarounds of duplicating layers to a new document and saving that did not work.
While working with the file, my iMac (late 2012) visibly struggled with performance in PS — it would easily take 10-20s for any change to update on-screen.
This led me to suspect that the issue was systemic, and after some experimenting I found the culprit:
The file (4316x3152) in question contains 1 group of several nested groups, many of which contain layers or groups with added layer effects such as large glows or drop shadows (100px+). It turned out that the file (created by one of our juniors) had a large dropshadow effect applied to the parent group — removing this layer effect fixed the crash problem, and completely fixed the performance issues.
A colleague working on Windows did not experience the crash.