Minor clarification about the direct mode

diff --git a/manual.txt b/manual.txt
index 545b7dad9323c60d18678360ce1dcea74b683593..57c028261bcb301a8e840175cfb403782d793ea9 100644 (file)
--- a/manual.txt
+++ b/manual.txt
@@ -401,8 +401,13 @@ dependency file, etc) from the cache.
 
 ccache has two ways of doing the detection:
 
-* the *direct mode* (hashes the source code and include files directly)
-* the *preprocessor mode* (hashes output from the preprocessor)
+* the *direct mode*, where ccache hashes the source code and include files
+  directly
+* the *preprocessor mode*, where ccache runs the preprocessor on the source
+  code and hashes the result
+
+The direct mode is generally faster since running the preprocessor has some
+overhead.
 
 
 The direct mode