[pypy-commit] benchmarks default: (__stian__) add pidigits benchmark to the nightly run

[fijal]

Author: Maciej Fijalkowski <fijall at gmail.com>
Branch: 
Changeset: r189:f054077717fa
Date: 2012-08-30 22:07 +0200
http://bitbucket.org/pypy/benchmarks/changeset/f054077717fa/

Log:	(__stian__) add pidigits benchmark to the nightly run

diff --git a/benchmarks.py b/benchmarks.py
--- a/benchmarks.py
+++ b/benchmarks.py
@@ -41,6 +41,7 @@
 
 opts = {
     'gcbench' : {'iteration_scaling' : .10},
+    'pidigits': {'iteration_scaling' : .10},
     'bm_mako' : {'bm_env': {'PYTHONPATH': relative('lib/mako')}},
     'bm_chameleon': {'bm_env': {'PYTHONPATH': relative('lib/chameleon/src')},
                      'iteration_scaling': 3},
@@ -60,7 +61,7 @@
 for name in ['float', 'nbody_modified', 'meteor-contest', 'fannkuch',
              'spectral-norm', 'chaos', 'telco', 'go', 'pyflate-fast',
              'raytrace-simple', 'crypto_pyaes', 'bm_mako', 'bm_chameleon',
-             'json_bench']:
+             'json_bench', 'pidigits']:
     _register_new_bm(name, name, globals(), **opts.get(name, {}))
 for name in ['names', 'iteration', 'tcp', 'pb', ]:#'web']:#, 'accepts']:
     if name == 'web':
diff --git a/own/pidigits.py b/own/pidigits.py
new file mode 100644
--- /dev/null
+++ b/own/pidigits.py
@@ -0,0 +1,47 @@
+import time
+
+PIDIGITS_LEN = 15000
+
+def pidigits(length):
+    i = k = ns = 0
+    k1 = 1
+    n,a,d,t,u = 1,0,1,0,0
+    while(True):
+        k += 1
+        t = n<<1
+        n *= k
+        a += t
+        k1 += 2
+        a *= k1
+        d *= k1
+        if a >= n:
+            t,u = divmod(n*3 + a,d)
+            u += n
+            if d > u:
+                ns = ns*10 + t
+                i += 1
+                if i % 10 == 0:
+                    ns = 0
+                if i >= length:
+                    break
+                a -= d*t
+                a *= 10
+                n *= 10
+
+def main(n):
+    l = []
+    for i in range(n):
+        t0 = time.time()
+        pidigits(PIDIGITS_LEN)
+        l.append(time.time() - t0)
+    return l
+
+if __name__ == '__main__':
+    import util, optparse
+    parser = optparse.OptionParser(
+        usage="%prog [options]",
+        description="Test the pidigit calculation performance")
+    util.add_standard_options_to(parser)
+    options, args = parser.parse_args()
+
+    util.run_benchmark(options, options.num_runs, main)