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Postings from December 2008
David Nicol wrote: > On Tue, Dec 23, 2008 at 5:51 AM, Nicholas Clark <nick@ccl4.org> wrote: >> Jarkko alerted me to this >> http://www.daemonology.net/blog/2008-06-05-faster-utf8-strlen.html >> >> which references our very own Aristotle Pagaltzis. >> >> Is anyone interested in experimenting with his bit-smashing approach and >> seeing whether it can be used in Perl_utf8_length(), and what sort of a >> speedup it gives? It's not the world's largest function: > > That was fun. The attached patch should be faster than Colin > Percivals because we're not checking for zero bytes all the time, and > the Duff's device to avoid most of the length checks. > > > The pre-existing function works on UTF-EBCDIC. It appears to me that this patch does not, which is fine as long as it's #ifdef'd.Thread Previous | Thread Next