[cfe-commits] r69987 - in /cfe/trunk: include/clang/Frontend/PCHBitCodes.h include/clang/Lex/HeaderSearch.h lib/Frontend/PCHReader.cpp lib/Frontend/PCHWriter.cpp lib/Lex/HeaderSearch.cpp lib/Lex/PPLexerChange.cpp test/PCH/objc_import.h test/PCH/objc_import.m
snaroff at apple.com
Fri Apr 24 13:49:27 PDT 2009
Here are the PCH stats (which jive with my previous email).
*** PCH Statistics:
2/26104 types read (0.007662%)
2/70883 declarations read (0.002822%)
589/51520 identifiers read (1.143245%)
0/34753 statements read (0.000000%)
550/6275 macros read (8.764940%)
0/5012 lexical declcontexts read (0.000000%)
0/4499 visible declcontexts read (0.000000%)
On Apr 24, 2009, at 4:47 PM, steve naroff wrote:
> On Apr 24, 2009, at 4:05 PM, Douglas Gregor wrote:
>> On Apr 24, 2009, at 1:03 PM, Steve Naroff wrote:
>> If there are a lot of these controlling macros, we're going to be
>> deserializing a bunch of macro definitions when we bring in the
>> header information. Did you look to see how this affects the macro
>> statistics on, e.g., Carbon.h PCH (using -print-stats)?
> I'll check, however the number is likely to be around 550 (see below).
> For C headers, almost all headers have an #ifndef guard. For Cocoa.h,
> the number will be much lower (since ObjC headers typically depend on
> *** HeaderSearch Stats:
> 562 files tracked.
> 3 #import/#pragma once files.
> 551 included exactly once.
> 5 max times a file is included.
> 1474 #include/#include_next/#import.
> 896 #includes skipped due to the multi-include optimization.
> 67 framework lookups.
> 30 subframework lookups.
>> - Doug
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