http://dev.clojure.org/jira This file is an XML representation of an issue en-us 4.4 649 25-07-2011 http://dev.clojure.org/jira/browse/CLJ-785 Clojure <p>Optimization to / such that the <tt>&amp; more</tt> version expands to equivalent of <tt>(/ x (reduce * y more))</tt> rather than <tt>(reduce / (/ x y) more)</tt>. There should be an inlined variant of <tt>&amp; more</tt> as well.</p> <p>This was originally part of <a href="http://dev.clojure.org/jira/browse/CLJ-184" title="n-ary bit functions, also inlining of n-ary bit and math operations"><del>CLJ-184</del></a>, but was pulled out because it's big enough to be its own ticket. The rationale is that multiplies are significantly faster than divides on the JVM, and n-ary calls to / could be faster.</p> <p>See <a href="http://lingpipe-blog.com/2009/05/13/java-multiplication-faster-than-division-in-jdk-1-6/">"Java Multiplication (Much) Faster than Division"</a> for background and Java benchmarks.</p> CLJ-785

Optimize /

Enhancement Major Closed Declined Unassigned Alan Dipert Sat, 30 Apr 2011 16:09:40 -0500 Fri, 13 May 2011 09:26:14 -0500 Fri, 13 May 2011 09:26:13 -0500 Backlog 0 0 <p>We don't want to mess with the semantics of division at the bottom.</p> Global Rank