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Author ztane
Recipients serhiy.storchaka, vstinner, yselivanov, ztane
Date 2016-08-12.07:38:32
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About "I hesitate between the C types "int" and "Py_ssize_t" for nargs. I read once that using "int" can cause performance issues on a loop using "i++" and "data[i]" because the compiler has to handle integer overflow of the int type."

This is true because of -fwrapv, but I believe it is true also for Py_ssize_t which is also of signed type. However, there would be a speed-up achievable by disabling -fwrapv, because only then the i++; data[i] can be safely optimized into *(++data)
Date User Action Args
2016-08-12 07:38:32ztanesetrecipients: + ztane, vstinner, serhiy.storchaka, yselivanov
2016-08-12 07:38:32ztanesetmessageid: <>
2016-08-12 07:38:32ztanelinkissue27128 messages
2016-08-12 07:38:32ztanecreate