its not faster and the accuracy improvement is more of a curiosity than of real value.
infact on modern desktop/console hardware invsqrt hack is really bad. it causes type aliasing which is 'expensive' in native software terms. the x86(-64) chips underlying them all now has a dedicated instruction for this, as do the PPCs that came in the generation before... still of value on ARM though which is becoming more and more important.
infact on modern desktop/console hardware invsqrt hack is really bad. it causes type aliasing which is 'expensive' in native software terms. the x86(-64) chips underlying them all now has a dedicated instruction for this, as do the PPCs that came in the generation before... still of value on ARM though which is becoming more and more important.