Slow indexing and/or hashing in nearly low memory in OSX I have observed slow indexing and/or hashing in OSX which are expressed in the SSD disc which is nearly full (about 5% free space). 
This bug has been reported to me to exist in earlier OSXs too so not only OSX Yosemite. 
The system is Macbook Air 2013-mid. 
This bug may be related to the similar bug with long filenames which indexing and/or hashing takes much time in the same system and settings, here discussion.

I notice slow indexing and/or hashing in installing basic commands through homebrew and just doing basic search in Finder with long filenames:


Slow rehashing (reported to me no indexing necessary) in nearly low SSD-memory system of Macbook air 2013-mid; I have reproduced it in OSX Yosemite 10.10.2
See this post here where patrix deleted my notice about slow indexing.
Slow indexing and/or hashing also occurs in searching long filenames, discussion here.


To reproduce it, you need


nearly low SSD memory


This indexing problem may be caused by handling of SSD memories and temporary memory. 

How have you resolved the challenge of memory management in OSX?
I do not know the level of memory when the problems starts to occur.
This is a history note for a bug report to Apple, made here. 
As discussed earlier with admins, this is ok, since this is one attempt for solution. 
Apple does not keep public those reports and does not send any documentation to users so we must keep them public, since they do not do it.