[Scons-users] Performance of version 2.5.0 vs 2.3.0 on Windows host dropped significantly

[hmnews at proconx.com]

William,

Here are the stats for the full build (after clean):

2.3.0: 12.8s
2.3.5: 13.3s
2.3.6: 13.3s
2.5.0: 19.3s
2.5.0 with pull request applied: 13.42 !!!

There is no measurable difference between 2.3.5, 2.3.6 and 2.5.0 with PR 
applied. Differences in the sub-second level are influenced by 
measurement noise. 2.3.0 appears slightly faster, I never managed to get 
below 13s with the other versions.

All measurements, these full build times and previous no-change times 
were using num_jobs set to 8 which is my default.

So I definitely suggest to roll your PR into the next release.

Henrik

William Blevins wrote:
> Henrik,
>
> As a side note, the performance differences from previous versions is
> useful. Do you also happen to have performance for full builds for my
> reference? Some of those patches may have traded base overhead (slower
> already up-to-date) for faster runtime (full or partial build time).
>
> V/R,
> William
>