unroll a bit for testing

1 files changed, 21 insertions, 4 deletions

diff --git a/lzf_c.c b/lzf_c.c
index 5b42a36..554e996 100644
--- a/lzf_c.c
+++ b/lzf_c.c
@@ -160,10 +160,6 @@ lzf_compress (const void *const in_data, unsigned int in_len,
               if (expect_false (op + lit + 1 + 3 >= out_end))
                 return 0;
 
-              do
-                len++;
-              while (len < maxlen && ref[len] == ip[len]);
-
               if (lit)
                 {
                   *op++ = lit - 1;
@@ -173,6 +169,27 @@ lzf_compress (const void *const in_data, unsigned int in_len,
                   while (++lit);
                 }
 
+              for (;;)
+                {
+                  if (expect_true (ip < in_end - 2 - 8 && maxlen > 8))
+                    {
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                      len++; if (ref [len] != ip [len]) break;
+                    }
+
+                  do
+                    len++;
+                  while (len < maxlen && ref[len] == ip[len]);
+
+                  break;
+                }
+
               len -= 2;
               ip++;