From: Chris Lattner <sabre@nondot.org>
Date: Fri, 16 Jan 2009 19:33:59 +0000 (+0000)
Subject: Random note so I remember how to do this :)
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=eab819b41d64ab9624030437ca289cf864ba9f77;p=clang

Random note so I remember how to do this :)


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62344 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/NOTES.txt b/NOTES.txt
index 0759acf355..6fc312c0c3 100644
--- a/NOTES.txt
+++ b/NOTES.txt
@@ -11,6 +11,13 @@ To time GCC preprocessing speed without output, use:
    "time gcc -MM file"
 This is similar to -Eonly.
 
+//===---------------------------------------------------------------------===//
+
+Creating and using a PTH file for performance measurement (use a release-asserts
+build).
+
+$ clang -x objective-c-header INPUTS/Cocoa_h.m -o /tmp/tokencache
+$ clang -token-cache /tmp/tokencache INPUTS/Cocoa_h.m
 
 //===---------------------------------------------------------------------===//