1 files changed, 73 insertions, 0 deletions
diff --git a/examples/speed_test.c b/examples/speed_test.c
new file mode 100644
index 0000000..d9ce5aa
--- /dev/null
+++ b/examples/speed_test.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 2007 Josh MacDonald */
+
+#include "test.h"
+
+usize_t bench_speed(const uint8_t *from_buf, const size_t from_len,
+		 const uint8_t *to_buf, const size_t to_len,
+		 uint8_t *delta_buf, const size_t delta_alloc,
+		 int flags) {
+  usize_t delta_size;
+  int ret = xd3_encode_memory(to_buf, to_len, from_buf, from_len,
+			      delta_buf, &delta_size, delta_alloc, flags);
+  if (ret != 0) {
+    fprintf(stderr, "encode failure: %d: %s\n", ret, xd3_strerror(ret));
+    abort();
+  }
+  return delta_size;
+}
+
+int main(int argc, char **argv) {
+  int repeat, level;
+  char *from, *to;
+  uint8_t *from_buf = NULL, *to_buf = NULL, *delta_buf = NULL;
+  size_t from_len = 0, to_len, delta_alloc, delta_size = 0;
+  long start, finish;
+  int i, ret;
+  int flags;
+
+  if (argc != 5) {
+    fprintf(stderr, "usage: speed_test LEVEL COUNT FROM TO\n");
+    return 1;
+  }
+
+  level = atoi(argv[1]);
+  repeat = atoi(argv[2]);
+  from = argv[3];
+  to = argv[4];
+  flags = (level << XD3_COMPLEVEL_SHIFT) & XD3_COMPLEVEL_MASK;
+
+  if ((strcmp(from, "null") != 0 &&
+       (ret = read_whole_file(from, &from_buf, &from_len))) ||
+      (ret = read_whole_file(to, &to_buf, &to_len))) {
+    fprintf(stderr, "read_whole_file error\n");
+    goto exit;
+  }
+
+  delta_alloc = to_len * 11 / 10;
+  delta_buf = main_malloc(delta_alloc);
+
+  start = get_millisecs_now();
+
+  for (i = 0; i < repeat; ++i) {
+    delta_size = bench_speed(from_buf, from_len,
+			     to_buf, to_len, delta_buf, delta_alloc, flags);
+  }
+
+  finish = get_millisecs_now();
+
+  fprintf(stderr,
+	  "STAT: encode %3.2f ms from %s to %s repeat %d %zdbit delta %zd\n",
+	  (double)(finish - start) / repeat, from, to, repeat, sizeof (xoff_t) * 8, delta_size);
+
+  ret = 0;
+
+  if (0) {
+  exit:
+    ret = 1;
+  }
+    
+  main_free(to_buf);
+  main_free(from_buf);
+  main_free(delta_buf);
+  return ret;
+}