emscripten/tests/benchmark_utf16.cpp at incoming · JavaScriptIOT/emscripten · GitHub

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#include <stdio.h>

#include <string.h>

#include <wchar.h>

#include <iostream>

#include <cassert>

#include <emscripten.h>

double test(const unsigned short *str) {

double res = EM_ASM_DOUBLE({

var t0 = _emscripten_get_now();

var str = Module.UTF16ToString($0);

var t1 = _emscripten_get_now();

Module.print('t: ' + (t1 - t0) + ', len(result): ' + str.length + ', result: ' + str.slice(0, 100));

return (t1-t0);

}, str);

return res;

}

unsigned short *utf16_corpus = 0;

long utf16_corpus_length = 0;

unsigned short *randomString(int len) {

if (!utf16_corpus) {

// FILE *handle = fopen("ascii_corpus.txt", "rb");

FILE *handle = fopen("utf16_corpus.txt", "rb");

fseek(handle, 0, SEEK_END);

utf16_corpus_length = ftell(handle)/2;

assert(utf16_corpus_length > 0);

utf16_corpus = new unsigned short[utf16_corpus_length+1];

fseek(handle, 0, SEEK_SET);

fread(utf16_corpus, 2, utf16_corpus_length, handle);

fclose(handle);

utf16_corpus[utf16_corpus_length] = 0;

}

int startIdx = rand() % (utf16_corpus_length - len);

while((utf16_corpus[startIdx] & 0xFF00) == 0xDC00) {

++startIdx;

if (startIdx + len > utf16_corpus_length) len = utf16_corpus_length - startIdx;

}

assert(len > 0);

unsigned short *s = new unsigned short[len+1];

memcpy(s, utf16_corpus + startIdx, len*2);

s[len] = 0;

while(((unsigned short)s[len-1] & 0xFF00) == 0xD800) { s[--len] = 0; }

assert(len >= 0);

return s;

}

int main() {

srand(time(NULL));

double t = 0;

double t2 = emscripten_get_now();

for(int i = 0; i < 10; ++i) {

// FF Nightly: Already on small strings of 64 bytes in length, TextDecoder trumps in performance.

unsigned short *str = randomString(100);

t += test(str);

free(str);

}

double t3 = emscripten_get_now();

printf("OK. Time: %f (%f).\n", t, t3-t2);

#ifdef REPORT_RESULT

REPORT_RESULT(0);

#endif

}

emscripten/tests/benchmark_utf16.cpp at incoming · JavaScriptIOT/emscripten · GitHub

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