Re: Tooltips GC overhead

[Paul Eggert]

martin rudalics wrote:
> There are one call of `copy-sequence', two calls of `stringp', three of
> `setf', one of `propertize' and one of `selected-frame'.  Together these
> would allocate some 20 million bytes?

That's what it's saying, yes.

> OTOH the `copy-sequence', `face-attribute' and `alist-get' calls get
> nowhere listed.

copy-sequence and propertize are in C.  Either can easily allocate millions of 
bytes.

Perhaps face-attribute doesn't allocate storage; that would explain its not 
being listed.

alist-get is in a call to the setf macro and you may need to investigate what 
setf is really doing.  One way to look into that is to disassemble the byte code 
(type "M-x disassemble RET tooltip-show RET") and see what it does.