Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r51642:f1fb181c13a3
Date: 2012-01-22 12:22 +0100
http://bitbucket.org/pypy/pypy/changeset/f1fb181c13a3/
Log: Special-case "x ** 2" here instead.
diff --git a/pypy/objspace/std/floatobject.py b/pypy/objspace/std/floatobject.py
--- a/pypy/objspace/std/floatobject.py
+++ b/pypy/objspace/std/floatobject.py
@@ -443,6 +443,8 @@
y = w_float2.floatval
# Sort out special cases here instead of relying on pow()
+ if y == 2.0: # special case for performance:
+ return W_FloatObject(x * x) # x * x is always correct
if y == 0.0:
# x**0 is 1, even 0**0
return W_FloatObject(1.0)
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