[cfe-commits] r70055 - in /cfe/trunk: include/clang/Frontend/PCHBitCodes.h include/clang/Frontend/PCHReader.h include/clang/Frontend/PCHWriter.h lib/Frontend/PCHReader.cpp lib/Frontend/PCHWriter.cpp

[Douglas Gregor]

On Apr 25, 2009, at 10:48 AM, Douglas Gregor wrote:

> Author: dgregor
> Date: Sat Apr 25 12:48:32 2009
> New Revision: 70055
>
> URL: http://llvm.org/viewvc/llvm-project?rev=70055&view=rev
> Log:
> Load the selector table lazily from the PCH file.
>
> This results in a 10% speedup on the Cocoa-prefixed "Hello, World!",
> all of which is (not surprisingly) user time. There was a tiny
> reduction in the size of the PCH file for Cocoa.h, because certain
> selectors aren't being written twice.

... and I neglected to provide the PCH statistics for the Cocoa- 
prefixed "Hello, world!", which are:

   *** PCH Statistics:
   18/20838 types read (0.086381%)
   16/80753 declarations read (0.019814%)
   527/56449 identifiers read (0.933586%)
   0/6654 selectors read (0.000000%)
   0/30265 statements read (0.000000%)
   470/7806 macros read (6.021009%)
   0/4598 lexical declcontexts read (0.000000%)
   0/4027 visible declcontexts read (0.000000%)
   0/6654 method pool entries read (0.000000%)

Most of the macros and identifiers read are due to the non-lazy  
"#import".

	- Doug