Krew, Sorry that I missed an optimization issue in 2.5.0. It hasn't seemed to affect many projects, so it appears to be dependent on particular project properties outside of my prediction and which I can only guess about. I was curious if I had forgotten or neglected to run the scons_testsuite <https://bitbucket.org/dirkbaechle/scons_testsuite> like a good developer. Although I am not building all 6 with this machine/setup, of the 3 that build with my current tool setup, there is very little performance difference.
questfperf > >> with patch > run: 321.5 > update: 23.8 > update_implicit: 16.1 > >> without patch > run: 328.2 > update: 26.6 > update_implicit: 16.2 > > wonderbuild > >> with patch > run: 382.2 > update: 19.1 > implicit_update: 17.9 > >> without patch > run: 396.0 > update: 19.1 > update_implicit: 18.1 > > sconsbld > >> with patch > run: 112.5 > update: 32.4 > update_implicit: 23.7 > >> without patch > run: 115.5 > update: 32.9 > update_implicit: 24.1 > This is more like what I was expecting: a marginal difference that would be unnoticeable at worst. I was concerned about new dependencies causing slowdowns, but that doesn't appear to be the case for projects that observed this issue. We may want to consider adding some other project samples to scons_testsuite. I will ask around some of the user's that reported issues if there project source is available. V/R, William
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