tree b8ae972bdf6bb4270c5cead8e29b93673af836d9
parent cd4cbc9102e7c58ecd6561d8c2d2055f76de4141
author Nigel Tao <nigeltao@golang.org> 1600838507 +1000
committer Nigel Tao <nigeltao@golang.org> 1600838592 +1000

Use a formula to calculate Eisel-Lemire power-of-2

On a mid-range x86_64 laptop, processing the 181 MiB citylots.json file
from github.com/zemirco/sf-city-lots-json:

$ g++ -O3 script/process-json-numbers.c
$ time ./a.out -parse-number-f64 < citylots.json
Before/After:
real    0m0.992s
real    0m1.035s