tree 756af6a237c4ba6c4ed64391756b19cb5f27fefb
parent b6d855210c872092b8c3119715ee9712fdeb44d0
author Nigel Tao <nigeltao@golang.org> 1600840333 +1000
committer Nigel Tao <nigeltao@golang.org> 1600841907 +1000

Trim Eisel-Lemire powers-of-10 tables

This tracks the upstream github.com/lemire/fast_double_parser

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    0m1.035s
real    0m1.003s

Binary size, before:
29544 gen/lib/c/clang-9-dynamic/wuffs-base-floatconv.lo
29648 gen/lib/c/clang-9-static/wuffs-base-floatconv.o
31192 gen/lib/c/gcc-dynamic/wuffs-base-floatconv.lo
31160 gen/lib/c/gcc-static/wuffs-base-floatconv.o

After:
27160 gen/lib/c/clang-9-dynamic/wuffs-base-floatconv.lo
27264 gen/lib/c/clang-9-static/wuffs-base-floatconv.o
28760 gen/lib/c/gcc-dynamic/wuffs-base-floatconv.lo
28760 gen/lib/c/gcc-static/wuffs-base-floatconv.o