Improve NEWS

diff --git a/NEWS.txt b/NEWS.txt
index 82f1bc2b75f347a5e69c128a57fb96079bac8121..62d2fa108b5189d64bfa0cd2e4280a0500a7cd9b 100644 (file)
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -40,11 +40,12 @@ New features and improvements
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
     - ccache now has a ``direct mode'' where it computes a hash of the source
-      code and compiler arguments without running the preprocessor. By not
-      running the preprocessor, CPU usage is reduced; the runtime is about
-      0.2-1.0 times that of ccache running in traditional mode. The relative
-      speedup will be higher when I/O is fast (e.g., when files are in the disk
-      cache). The direct mode can be disabled by setting +CCACHE_NODIRECT+.
+      code (including all included files) and compiler arguments without
+      running the preprocessor. By not running the preprocessor, CPU usage is
+      reduced; the speed is about 1-5 times that of ccache running in
+      traditional mode. The relative speedup will be higher when I/O is fast
+      (e.g., when files are in the disk cache). The direct mode can be disabled
+      by setting +CCACHE_NODIRECT+.
 
     - Support has been added for rewriting absolute paths to relative paths
       when hashing, in order to increase cache hit rate when building the same