bad linking times [was Re: SUBMISSION: New Library for kdesupport: indexlib]
pynm0001 at comcast.net
Sat Jun 11 02:39:42 BST 2005
On Friday 10 June 2005 20:43, Brad Hards wrote:
> On Sat, 11 Jun 2005 05:37 am, Michael Pyne wrote:
> > Even without --enable-final, kdebindings/smoke takes damn near forever
> > for me. Ironically it spends most (damn near an hour) of its time linking
> > (I suspect because I pass -Wl,-O1 to ld).
> A really new binutils might help - Ben Elliston told me that he fixed a
> terrible algorithm that made a lot of difference. Not sure which version,
> or even if it is applied.
I had 2.16 installed. The only newer version I can find is a CVS pre-release
that Gentoo has packaged (188.8.131.52.3). I decided to try that to see if it
was the difference. I'm using juk to test instead of smoke to save me some
What I did was do "rm juk ; time unsermake" in the juk build directory.
ccache doesn't apply to this step so you don't have to worry about that. I
performed this step once before recording times in order to eliminate cache
issues. The times listed are the total wallclock times (and I only did it
twice for expediency).
So there is definitely an improvement, but it doesn't look like it would help
all that much linking smoke (unless the change in question is one that e.g.
changes an O(n^2) algorithm to O(n log n) and my n is too small to perceive
the change). But I don't want to delete libsmoke to find out. =D
- Michael Pyne
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