Re: [Boost-build] Profiling questions

From: Rene Rivera (grafik.list_at_[hidden])
Date: 2006-02-06 11:12:18

Vladimir Prus wrote:
> Rene,
> I've a question about new -d+10 output. What is the "[OTHER]" entry? It takes 
> quite a lot of time, so I'd be interested to know what's that.

It's anything that calls 'profile_enter(0,prof)'. Which currently is 
only used by the hashitem(...) call. SO it's the profile for finding or 
adding to the various hash tables.

> Also, without "-d+10" the running time of bjam is 8 secs. With "-d+10" (and 
> redirection to a file), it's 30 secs. Earlier, -d+10 did not add much too 
> running time, and such big difference is suspicious.

Since it's a frequently called function I can see it having such an 
impact. Because of the impact there's a define at the top of hash.c 
(HASH_DEBUG_PROFILE) which you can comment out do disable it. Just 
change line #29 from "/* */" to "/* *".

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