sqrt(x) = pow(x,.5)

true

sqrt(x) = pow(x,.5) = x^.5

so not true

quote:

---

Original post by Anonymous Poster
sqrt(x) = pow(x,.5)

true

sqrt(x) = pow(x,.5) = x^.5

so not true

---

Wtf are you talking about, that''s completely true unless you are thinking of ^ as the xor operator.

Which I were...

Lookup tables are alot slower than using sqrt.
Lookuptables require access to primary mem which is slow compared to using sqrt (which uses the registers)...the whole cache thing is also important, you''ll get tons of misses.

The "lookup table" opt. is a relic from the days of 486 and below.

If you are willing to loose accuracy in your Sqrt''s there are a few fast Assembler routines.
That''s the main point: It''s a tradeoff between speed and accuracy..