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Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
... to the reciprocal, accurate to about 11 bits.
sqrtss is generating a far more accurate result, for when accuracy is required. rsqrtss exists for the cases when an approximation suffices, but speed is required. If you read Intel's documentation, you will also find an instruction sequence (recipro...
C++ cout hex values?
...hich is why printf("hello\n") is equivalent to fprintf(stdout, "hello\n"). More usefully, you can pass stdout (or stdin, or stderr) to a function that takes a FILE* argument.
– Keith Thompson
Feb 3 '16 at 21:18
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How to log source file name and line number in Python
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Use this for more details: formatter = logging.Formatter( '%(asctime)s, %(levelname)-8s [%(filename)s:%(module)s:%(funcName)s:%(lineno)d] %(message)s')
– Girish Gupta
Mar 8 '18 at 9:43
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How to detect first time app launch on an iPhone
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Removing duplicate rows from table in Oracle
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Visual Studio: ContextSwitchDeadlock
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Many of the more recent versions of Visual Studio (2012, 2010, 2008) and possibly some earlier ones, allow one to choose the primary use of Visual Studio when it is first run after installation. That choice determines the default layout...
Converting camel case to underscore case in ruby
...nderscore
Both options ways will yield "camel_cased_name". You can check more details it here.
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Disable Rails SQL logging in console
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Using regular expression in css?
... tweaks the specificity so they are harder to override which usually hurts more than it helps in my experience. I use id's... just not for applying css.
– prodigitalson
Jan 17 '12 at 23:55
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Design by contract using assertions or exceptions? [closed]
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