Ted Kremenek d5e6e16d0d PTH: Hook up getSpelling() caching in PTHLexer. This results in a nice ... performance gain. Here's what we see for -Eonly on Cocoa.h (using PTH): - wall time decreases by 21% (26% speedup overall) - system time decreases by 35% - user time decreases by 6% These reductions are due to not paging source files just to get spellings for literals. The solution in place doesn't appear to be 100% yet, as we still see some of the pages for source files getting mapped in. Using -print-stats, we see that SourceManager maps in 7179K less bytes of source text (reduction of 75%). Will investigate why the remaining 25% are getting paged in. With these changes, here's how PTH compares to non-PTH on Cocoa.h: -Eonly: PTH takes 64% of the time as non-PTH (54% speedup) -fsyntax-only: PTH takes 89% of the time as non-PTH (11% speedup) llvm-svn: 61913		2009-01-08 04:30:32 +00:00
clang	PTH: Hook up getSpelling() caching in PTHLexer. This results in a nice	2009-01-08 04:30:32 +00:00
llvm	Add APIs to record regions and variables.	2009-01-08 02:49:34 +00:00