Changeset 2850 for trunk/src/kmk/dir.c

Timestamp:

Aug 30, 2016, 6:06:31 PM (9 years ago)

Author:

bird

Message:

kmk: optimizations.

File:

• trunk/src/kmk/dir.c (modified) (3 diffs)

trunk/src/kmk/dir.c

@@ -594 +594 @@
           if (HASH_VACANT (dc))
             {
+#if defined(WINDOWS32) && defined(KMK)
+              static char s_last_volume[4];
+              static int  s_last_flags;
+#endif
               /* Nope; this really is a directory we haven't seen before.  */
 
@@ -625 +629 @@
                */
               w32_path[3] = '\0';
+# ifdef KMK /* Need for speed: Cache the GetVolumeInformation result. */
+              if (   s_last_volume[0] == w32_path[0]
+                  && s_last_volume[1] == w32_path[1]
+                  && s_last_volume[2] == w32_path[2]
+                  && s_last_volume[3] == w32_path[3])
+                dc->fs_flags = s_last_flags;
+              else
+                {
+# endif
               if (GetVolumeInformation(w32_path,
                      fs_label, sizeof (fs_label),
@@ -636 +649 @@
               else
                 dc->fs_flags = FS_UNKNOWN;
+# ifdef KMK
+                  s_last_volume[0] = w32_path[0];
+                  s_last_volume[1] = w32_path[1];
+                  s_last_volume[2] = w32_path[2];
+                  s_last_volume[3] = w32_path[3];
+                  s_last_flags     = dc->fs_flags;
+                }
+# endif
 #else
 # ifdef VMS