add 'setup.py speed' to run benchmarks

refs #30

.travis.yml

@@ -9,3 +9,4 @@ python:
 install: true
 script:
   - python setup.py test
+  - python setup.py speed

setup.py

@@ -5,6 +5,7 @@
 except ImportError:
     # but most users really don't require it
     from distutils.core import setup, Command
+import timeit
 
 import versioneer
 versioneer.versionfile_source = "ecdsa/_version.py"
@@ -35,6 +36,44 @@ def run(self):
         # all tests os.exit(1) upon failure
 commands["test"] = Test
 
+class Speed(Test):
+    description = "run benchmark suite"
+    def run(self):
+        def do(setup_statements, statement):
+            # extracted from timeit.py
+            t = timeit.Timer(stmt=statement,
+                             setup="\n".join(setup_statements))
+            # determine number so that 0.2 <= total time < 2.0
+            for i in range(1, 10):
+                number = 10**i
+                x = t.timeit(number)
+                if x >= 0.2:
+                    break
+            return x / number
+
+        for curve in ["NIST192p", "NIST224p", "NIST256p", "SECP256k1",
+                      "NIST384p", "NIST521p"]:
+            S1 = "import ecdsa"
+            S2 = "sk = ecdsa.SigningKey.generate(ecdsa.%s)" % curve
+            S3 = "msg = 'msg'"
+            S4 = "sig = sk.sign(msg)"
+            S5 = "vk = sk.get_verifying_key()"
+            S6 = "vk.verify(sig, msg)"
+            # We happen to know that .generate() also calculates the
+            # verifying key, which is the time-consuming part. If the code
+            # were changed to lazily calculate vk, we'd need to change this
+            # benchmark to loop over S5 instead of S2
+            keygen = do([S1], S2)
+            sign = do([S1,S2,S3], S4)
+            verf = do([S1,S2,S3,S4,S5], S6)
+            import ecdsa
+            sig = ecdsa.SigningKey.generate(getattr(ecdsa, curve)).sign("msg")
+            print "%9s: siglen=%3d, keygen=%.3fs, sign=%.3fs, verify=%.3fs" \
+                  % (curve, len(sig), keygen, sign, verf)
+
+commands["speed"] = Speed
+
+
 setup(name="ecdsa",
       version=versioneer.get_version(),
       description="ECDSA cryptographic signature library (pure python)",