digitalmars.D.bugs - [Issue 2528] New: Arrays in Phobos shold be pre-allocated.
- d-bugmail puremagic.com (20/20) Dec 20 2008 http://d.puremagic.com/issues/show_bug.cgi?id=2528
- d-bugmail puremagic.com (8/8) Dec 20 2008 http://d.puremagic.com/issues/show_bug.cgi?id=2528
- d-bugmail puremagic.com (6/6) Dec 20 2008 http://d.puremagic.com/issues/show_bug.cgi?id=2528
- d-bugmail puremagic.com (9/9) Apr 24 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2528
http://d.puremagic.com/issues/show_bug.cgi?id=2528 Summary: Arrays in Phobos shold be pre-allocated. Product: D Version: 2.022 Platform: PC OS/Version: Windows Status: NEW Severity: enhancement Priority: P2 Component: Phobos AssignedTo: bugzilla digitalmars.com ReportedBy: dsimcha yahoo.com Looking at the sources to Phobos, I see several places, including std.algorithm.map(), and the array-to-array conversion function of std.conv, where the ~= operator is used, even though the length of the array returned by these functions is known at the beginning of the function. This severely hurts the performance of these functions, given how slow ~= is. Furthermore, even if ~= were efficient, reallocating an array instead of preallocating is still too inefficient when it can be trivially optimized out. --
Dec 20 2008
http://d.puremagic.com/issues/show_bug.cgi?id=2528 andrei metalanguage.com changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|bugzilla digitalmars.com |andrei metalanguage.com Good point, will fix. --
Dec 20 2008
http://d.puremagic.com/issues/show_bug.cgi?id=2528 andrei metalanguage.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED --
Dec 20 2008
http://d.puremagic.com/issues/show_bug.cgi?id=2528 dsimcha yahoo.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED This looks to have been resolved in the new Phobos. --
Apr 24 2009