2022-08-19 02:15 AEST

View Revisions: Issue #562

Summary 0000562: performance regression since rotd-2022-05-01
Revision 2022-08-03 11:02 by wangp
Description The attached module compiles much slower than it used to.

I have bisected the regression to commit 911bc5ea0c6565b9ae48132b153182627b3ddbea "Convert more modules to use var_tables". The slow down occurs during the Fully expanding equivalence types step.


% time ~/local/stow/mercury-srcdist-rotd-2022-04-29/bin/mmc -C parse_tables.m
0.63s user 0.03s system 99% cpu 0.662 total

% time ~/local/stow/mercury-srcdist-rotd-2022-05-01/bin/mmc -C parse_tables.m
7.51s user 0.03s system 99% cpu 7.553 total
Revision 2022-08-03 10:37 by wangp
Description The attached module compiles much slower than it used to.

I have bisected the regression to commit 911bc5ea0c6565b9ae48132b153182627b3ddbea "Convert more modules to use var_tables". The slow down occurs during the Fully expanding equivalence types step.


% time ~/local/stow/mercury-srcdist-rotd-2022-04-29/bin/mmc -C parse_tables.m
0.63s user 0.03s system 99% cpu 0.662 total

% time ~/local/stow/mercury-srcdist-rotd-2022-05-30/bin/mmc -C parse_tables.m
7.80s user 0.03s system 99% cpu 7.846 total