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On 26/04/13 21:55, Freddie Chopin wrote:
W dniu 2013-04-26 21:42, Yaakov (Cygwin/X) pisze:On 2013-04-26 03:43, Sebastian Huber wrote:Use one memset() to initialize everything to zero. Set non-zero fields in a second step. There is only a small runtime overhead, but the code size is greatly reduced. This change assumes the NULL pointer and '\0' are encoded as zero bits.This sounds like a candidate for PREFER_SIZE_OVER_SPEED, but AFAICS that would mean moving that definition out of configure.host and into sys/config.h.I'm almost sure that memset() version will be both faster and smaller, especially because there was a memset() call anyway... In my opinion there is no tradeoff in this change - it's just better.
Due to the atexit() stuff in struct _reent the overhead is approximately memset(0, 0, 400)
-- Sebastian Huber, embedded brains GmbH Address : Dornierstr. 4, D-82178 Puchheim, Germany Phone : +49 89 189 47 41-16 Fax : +49 89 189 47 41-09 E-Mail : sebastian.huber@embedded-brains.de PGP : Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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