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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -1,3 +1,30 @@ +2005-04-12 Paul D. Smith <psmith@gnu.org> + + The second expansion feature causes significant slowdown. Timing + a complex makefile (GCC 4.1) shows a slowdown from .25s to just + read the makefile before the feature, to 11+s to do the same + operations after the feature. Additionally, memory usage + increased drastically. To fix this I added some intelligence that + avoids the overhead of the second expansion unless it's required. + + * dep.h: Add a new boolean field, need_2nd_expansion. + + * read.c (eval): When creating the struct dep for the target, + check if the name contains a "$"; if so set need_2nd_expansion to 1. + (record_files): If there's a "%" in a static pattern rule, it gets + converted to "$*" so set need_2nd_expansion to 1. + + * file.c (expand_deps): Rework to be more efficient. Only perform + initialize_file_variables(), set_file_variables(), and + variable_expand_for_file() if the need_2nd_expansion is set. + + * implicit.c (pattern_search): Default need_2nd_expansion to 0. + (pattern_search): Ditto. + * main.c (handle_non_switch_argument): Ditto. + (main): Ditto. + * read.c (read_all_makefiles): Ditto. + (eval_makefile): Ditto. + 2005-04-07 Paul D. Smith <psmith@gnu.org> * main.c (main) [WINDOWS32]: Export PATH to sub-shells, not Path. |