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
stamhe · Jan 16, 2009 · eab819b · eab819b
1 parent e2916d6
commit eab819b
Showing 1 changed file with 7 additions and 0 deletions.
diff --git 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
 
 //===---------------------------------------------------------------------===//