Add multi_hash (wip/untested)

bench/README.md

@@ -29,3 +29,7 @@ fastimagehash v0.1
 **ahash**
 ![ahash_s](results/ahash_small.png)
 ![ahash_l](results/ahash_large.png)
+
+**multi_hash**
+![multi_s](results/multi_small.png)
+![multi_l](results/multi_large.png)

bench/benchmark.py

@@ -36,3 +36,16 @@ print_result("ahash", timeit.timeit(
     stmt="average_hash(Image.open('%s'), hash_size=%d)" % (IMAGE, SIZE),
     number=COUNT
 ))
+
+print_result("multi", timeit.timeit(
+    setup="from imagehash import average_hash,phash,whash,dhash \n"
+          "from PIL import Image",
+    stmt="im = Image.open('%s');"
+         "size = %d;"
+         "average_hash(im.copy(), hash_size=size);"
+         "phash(im.copy(), hash_size=size);"
+         "whash(im.copy(), hash_size=size, remove_max_haar_ll=False);"
+         "dhash(im.copy(), hash_size=size);"
+         % (IMAGE, SIZE),
+    number=COUNT
+))

bench/run.py

@@ -34,4 +34,6 @@ for f in files:
                 method = "ahash"
             if "whash" in m:
                 method = "whash"
+            if "multi" in m:
+                method = "multi"
             print("%s_%s,%s" % (f, method, t))