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------- Additional comments from [EMAIL PROTECTED] Tue Jul 11 23:56:54 -0700 2006 ------- @ace_dent: the issue came up when a PNG was imported which just had one 80MB IDAT chunk. We just needed a 64x64 preview of it. The allocation 80MB isn't nice. Reading the whole thing costs a lot. When checksumming, there were all cache misses. Decompressing and filtering was all cache misses too. At least for interlaced PNGs this is a complete waste, when just the first pass of the decompression is needed. For non-interlaced the benefit is just the reduced cache misses, but with memory accesses costing almost 10 times more than cache hits it is very beneficial to be cache friendly. --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
