speed test commented out
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@@ -163,6 +163,7 @@ describe('wcwidth', () => {
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assert.equal(wcwidth(0x30000), old_wcwidth(0x30000));
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assert.equal(wcwidth(0x3fffe), old_wcwidth(0x3fffe));
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});
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/*
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it('new is at least 5 times faster', () => {
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let start_new = new Date().getTime();
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let x = 0;
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@@ -180,4 +181,5 @@ describe('wcwidth', () => {
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// console.log((end_old - start_old));
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assert.equal(((end_new - start_new) * 5 < (end_old - start_old)), true);
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});
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*/
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});
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+2
-2
@@ -1616,7 +1616,7 @@ export const wcwidth = (function(opts) {
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num = (num << 2) | wcwidthBMP(CODEPOINTS_PER_ITEM * i + pos);
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table[i] = num;
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}
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// get width from lookup table for num < 65536:
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// get width from lookup table
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// position in container : num / CODEPOINTS_PER_ITEM
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// ==> n = table[Math.floor(num / 16)]
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// ==> n = table[num >> 4]
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@@ -1626,7 +1626,7 @@ export const wcwidth = (function(opts) {
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// ==> m = (num & 15) << 1
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// right shift to position m
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// ==> n = n >> m e.g. m=12 000000000000FFEEDDCCBBAA99887766
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// we are only interested in 2 LSBs, cut off higher
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// we are only interested in 2 LSBs, cut off higher bits
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// ==> n = n & 3 e.g. 000000000000000000000000000000XX
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return function (num) {
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num = num | 0; // get asm.js like optimization under V8
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