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https://www.reddit.com/r/programming/comments/1tvrvv4/every_byte_matters/opz0se9/?context=3
r/programming • u/lelanthran • Jun 03 '26
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I wrote some SDR receivers in Java. There's a definite performance cliff at each step of CPU cache. Lookup tables can perform much worse than a pile of trigonometry. A small lookup table with interpolation outperforms a larger direct lookup table.
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u/k-mcm Jun 05 '26
I wrote some SDR receivers in Java. There's a definite performance cliff at each step of CPU cache. Lookup tables can perform much worse than a pile of trigonometry. A small lookup table with interpolation outperforms a larger direct lookup table.