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Postings from January 2001
>>>>> "DS" == Dan Sugalski <dan@sidhe.org> writes: DS> At 11:49 AM 1/6/01 +0000, Simon Cozens wrote: >> On Fri, Jan 05, 2001 at 11:42:32PM -0500, Uri Guttman wrote: >> > SC> 5x slowdown. >> > >> > not if you just check a flag in the main loop. you only check the event >> > system if you have pending events or signals, etc. the key is not >> > checking all events on each pass thru the loop. >> >> Which is exactly what Chip did in his safe-signals patch. 33% slowdown. DS> I think you misremember that number. IIRC it was somewhere between DS> 3%-5%. Heck, I barely managed a 33% slowdown forcing all variable DS> access to aquire a per-variable mutex. (A recursive one, no DS> less...) that is what i would expect form a simple flag test and every N tests doing a full event poll. and even up to 5-10% slowdown i would think is a good tradeoff for the flexibilty and ease of design win we get in the i/o and event guts. but then, i have always traded off speed for flexibility and ease. hey, so has perl! :) uri -- Uri Guttman --------- uri@sysarch.com ---------- http://www.sysarch.com SYStems ARCHitecture, Software Engineering, Perl, Internet, UNIX Consulting The Perl Books Page ----------- http://www.sysarch.com/cgi-bin/perl_books The Best Search Engine on the Net ---------- http://www.northernlight.comThread Previous | Thread Next