massively reduce the number of forks that busybox ash has to do while processing...

this is accomplished simply by changing the order in which it looks for builtins and applets

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7815 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/busybox/patches/270-ash_performance.patch b/package/busybox/patches/270-ash_performance.patch
new file mode 100644 (file)
index 0000000..eff7a5b
--- /dev/null
+++ b/package/busybox/patches/270-ash_performance.patch
@@ -0,0 +1,30 @@
+Index: busybox-1.4.2/shell/ash.c
+===================================================================
+--- busybox-1.4.2.orig/shell/ash.c     2007-07-01 05:33:08.371737750 +0200
++++ busybox-1.4.2/shell/ash.c  2007-07-01 05:33:11.703946000 +0200
+@@ -3957,12 +3957,6 @@
+       }
+ #endif
+ 
+-      if (is_safe_applet(name)) {
+-              entry->cmdtype = CMDNORMAL;
+-              entry->u.index = -1;
+-              return;
+-      }
+-
+       updatetbl = (path == pathval());
+       if (!updatetbl) {
+               act |= DO_ALTPATH;
+@@ -4074,6 +4068,12 @@
+               goto success;
+       }
+ 
++      if (is_safe_applet(name)) {
++              entry->cmdtype = CMDNORMAL;
++              entry->u.index = -1;
++              return;
++      }
++
+       /* We failed.  If there was an entry for this command, delete it */
+       if (cmdp && updatetbl)
+               delete_cmd_entry();