Created
November 25, 2016 03:30
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Test Node.js buffer zeroing scheme
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| /******************************************************************************/ | |
| 'use strict'; | |
| /******************************************************************************/ | |
| const fs = require('fs'); | |
| const cp = require('child_process'); | |
| const rl = require('readline'); | |
| /******************************************************************************/ | |
| const bufSize = 128; | |
| const fileSizeLimit = 256; | |
| const changeSycleSize = 8; | |
| const numberOfTests = 10; | |
| const modes = { | |
| newBuffer: { | |
| code: `console.log([...new Buffer(${bufSize})].reduce((a,v,i)=>\`\${a}\${v?\`\${i} \`:''}\`,''));\n`, | |
| scriptFileName: 'new-buffer.js', | |
| scriptFile: fs.openSync('new-buffer.js', 'w'), | |
| statFile: fs.openSync('new-buffer.log', 'w'), | |
| previousStat: '', | |
| }, | |
| allocUnsafe: { | |
| code: `console.log([...Buffer.allocUnsafe(${bufSize})].reduce((a,v,i)=>\`\${a}\${v?\`\${i} \`:''}\`,''));\n`, | |
| scriptFileName: 'alloc-unsafe.js', | |
| scriptFile: fs.openSync('alloc-unsafe.js', 'w'), | |
| statFile: fs.openSync('alloc-unsafe.log', 'w'), | |
| previousStat: '', | |
| }, | |
| allocUnsafeSlow: { | |
| code: `console.log([...Buffer.allocUnsafeSlow(${bufSize})].reduce((a,v,i)=>\`\${a}\${v?\`\${i} \`:''}\`,''));\n`, | |
| scriptFileName: 'alloc-unsafe-slow.js', | |
| scriptFile: fs.openSync('alloc-unsafe-slow.js', 'w'), | |
| statFile: fs.openSync('alloc-unsafe-slow.log', 'w'), | |
| previousStat: '', | |
| }, | |
| newSlowBuffer: { | |
| code: `console.log([...new require('buffer').SlowBuffer(${bufSize})].reduce((a,v,i)=>\`\${a}\${v?\`\${i} \`:''}\`,''));\n`, | |
| scriptFileName: 'new-slow-buffer.js', | |
| scriptFile: fs.openSync('new-slow-buffer.js', 'w'), | |
| statFile: fs.openSync('new-slow-buffer.log', 'w'), | |
| previousStat: '', | |
| }, | |
| alloc: { | |
| code: `console.log([...Buffer.alloc(${bufSize})].reduce((a,v,i)=>\`\${a}\${v?\`\${i} \`:''}\`,''));\n`, | |
| scriptFileName: 'alloc.js', | |
| scriptFile: fs.openSync('alloc.js', 'w'), | |
| statFile: fs.openSync('alloc.log', 'w'), | |
| previousStat: '', | |
| }, | |
| }; | |
| const maxCodeLength = Math.max(...Object.values(modes).map(mode => mode.code.length)); | |
| const remainder = maxCodeLength % changeSycleSize; | |
| const minCodeLengthInSycleStart = | |
| remainder === 1 ? maxCodeLength : maxCodeLength + changeSycleSize - remainder + 1; | |
| Object.values(modes).forEach((mode) => { | |
| mode.code += ' '.repeat(minCodeLengthInSycleStart - mode.code.length); | |
| }); | |
| /******************************************************************************/ | |
| Object.entries(modes).forEach(([modeName, mode], i) => { | |
| fs.writeSync(mode.scriptFile, mode.code); | |
| for (let codeSize = mode.code.length; codeSize <= fileSizeLimit; codeSize++) { | |
| info(`${i + 1}. ${modeName}: ${codeSize} bytes in file from ${fileSizeLimit}`); | |
| const stats = getStats(numberOfTests, mode.scriptFileName); | |
| const statsAverage = getStatsAverage(stats); | |
| if (statsAverage !== mode.previousStat) { | |
| fs.writeSync(mode.statFile, | |
| `${(codeSize - 1) % changeSycleSize === 0 ? ' ' : '* '}${codeSize}: ${statsAverage}\n` | |
| ); | |
| mode.previousStat = statsAverage; | |
| } | |
| fs.writeSync(mode.scriptFile, ' '); | |
| } | |
| }); | |
| info('Completed.\n'); | |
| /******************************************************************************/ | |
| function getStats(numberOfRepetitions, scriptFileName) { | |
| return new Array(numberOfRepetitions).fill('').map(() => | |
| cp.execSync(`node ${scriptFileName}`).toString().trim() | |
| ); | |
| } | |
| /******************************************************************************/ | |
| function getStatsAverage(stats) { | |
| const mostRepeatedEntryIndex = stats | |
| .map((stat1, i) => [i, stats.filter(stat2 => stat2 === stat1).length]) | |
| .sort((a, b) => b[1] - a[1])[0][0]; | |
| return stats[mostRepeatedEntryIndex]; | |
| } | |
| /******************************************************************************/ | |
| function info(message) { | |
| rl.cursorTo(process.stdout, 0); | |
| rl.clearLine(process.stdout, 0); | |
| process.stdout.write(message); | |
| } | |
| /******************************************************************************/ |
Author
Author
new-slow-buffer.log
105: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 108: 0 2 3 4 8 9 10 16 24 25 26 32 56 57 58 64 80 81 82 83 84 85 86 87 92 100 104 114 120 121 122 123
* 109: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 111: 0 2 3 4 8 9 10 16 24 25 26 32 56 57 58 64 80 81 82 83 84 85 86 87 92 100 104 114 120 121 122 123
* 112: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
113: 0 2 8 16 17 18 19 20 24 25 26 32 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 114: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 115: 0 2 3 8 12 13 17 18 19 20 21 22 23 24 25 26 27 28 29 33 34 38 39 40 41 42 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 66 67 72 76 77 81 82 83 84 85 86 92 93 94 95 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 122 126 127
* 116: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 119: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126
* 120: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
121: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 122: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126
* 123: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 124: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 130: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 131: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 138: 0 2 8 9 10 16 17 18 24 25 26 32 33 34 40 41 42 48 49 50 56 57 58 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 104 105 106 112 113 114 120 121 122
* 139: 0 2 8 16 17 18 19 20 25 26 32 80 81 82 88 89 90 96 97 98 99
* 140: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 141: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 142: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 143: 0 2 3 4 8 9 10 16 24 25 26 32 56 57 58 64 80 81 82 83 84 85 86 87 92 100 104 114 120 121 122 123
* 144: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 147: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114 115 116 117 118 119
* 148: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 149: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126
* 150: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 151: 0 2 8 16 17 18 19 20 25 26 32 80 81 82 88 89 90 96 97 98 99
* 152: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 155: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 96 97 98 99
* 156: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 158: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 159: 0 2 3 8 12 13 17 18 19 20 21 22 23 24 25 26 27 28 29 33 34 38 39 40 41 42 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 66 67 72 76 77 81 82 83 84 85 86 92 93 94 95 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 122 126 127
* 160: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 167: 0
* 168: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114
169: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 172: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 173: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 174: 0 2 8 9 10 16 17 18 24 25 26 32 33 34 41 42 48 49 50 56 57 58 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 104 105 106 112 113 114 120 121 122
* 175: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 176: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126
177: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 178: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126
* 179: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 182: 0 2 8 9 10 16 17 18 24 25 26 32 33 34 41 42 48 49 50 56 57 58 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 104 105 106 112 113 114 120 121 122
* 183: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
* 184: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 190: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 191: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 192: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114 115 116 117 118 119
193: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 194: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 195: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 196: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 100 101 112 113 114 115 116 117 120 121 122
* 197: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 198: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114
* 199: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 200: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114
201: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 204: 0 2 8 9 10 16 17 18 24 25 26 32 33 34 41 42 48 49 50 56 57 58 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 104 105 106 112 113 114 120 121 122
* 205: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 208: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114 115 116 117 118 119
209: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 210: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 212: 0
* 213: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 214: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 96 97 98 99
* 215: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 219: 0 2 3 4 8 9 10 16 24 25 26 32 56 57 58 64 80 81 82 83 84 85 86 87 92 100 104 114 120 121 122 123
* 220: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 223: 0 2 8 16 17 18 19 20 24 25 26 32 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 224: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 226: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 227: 0 2 8 9 10 16 17 18 24 25 26 32 33 34 40 41 42 48 49 50 56 57 58 64 65 66 72 73 74 80 81 82 89 90 96 97 98 104 105 106 112 113 114 120 121 122
* 228: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 237: 0 2 3 4 8 9 10 16 24 25 26 32 56 57 58 64 80 81 82 83 84 85 86 87 92 100 104 114 120 121 122 123
* 238: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 239: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 116 117
* 240: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 242: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 246: 0 2 8 16 17 18 19 20 24 25 26 32 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 247: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 250: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 113 114 115 116 117 118 119
* 251: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
* 252: 0 2 3 4 8 9 10 16 24 25 26 32 56 57 58 64 80 81 82 83 84 85 86 87 92 100 104 114 120 121 122 123
* 253: 0 2 3 8 16 17 18 19 20 24 25 26 27 32 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114
* 254: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99 112 120
* 255: 0 2 8 16 17 18 19 20 24 25 26 32 80 81 82 88 89 90 96 97 98 99
Author
alloc-unsafe-slow.log
105: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 88 89 90 96 97 98 99 112 113 114 120 121 122
* 111: 0 2 16 17 18 25 26 40 41 42 48 49 50 64 65 66 72 73 74 88 89 90 96 97 98 99 112 113 114 120 121 122
* 112: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 88 89 90 96 97 98 99 112 113 114 120 121 122
* 118: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 88 89 90 96 97 98 99 112 113 114 120 122
* 119: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 88 89 90 96 97 98 99 112 113 114 120 121 122
* 143: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 99 112 113 114 120 121 122
* 151: 0 6 7 8 12 13 14 15 16 17 18 19 20 21 25 26 30 31 32 33 34 35 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 62 63 64 65 69 70 71 72 73 74 75 79 80 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 109 113 114 118 119 120 121 122 123 124 125 126 127
* 152: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 99 112 113 114 120 121 122
* 171: 0 2 3 16 17 18 19 24 25 26 27 40 41 42 43 48 49 50 51 64 65 66 67 72 73 74 75 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114 115 120 121 122 123
* 172: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 99 112 113 114 120 121 122
* 202: 0 2 16 17 18 25 26 40 41 42 48 49 50 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 99 112 113 114 120 121 122
* 203: 0 2 3 16 17 18 19 24 25 26 27 40 41 42 43 48 49 50 51 64 65 66 67 72 73 74 75 80 81 82 83 88 89 90 91 96 97 98 99 112 113 114 115 120 121 122 123
* 204: 0 2 16 17 18 24 25 26 40 41 42 48 49 50 64 65 66 72 73 74 80 81 82 88 89 90 96 97 98 99 112 113 114 120 121 122
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alloc-unsafe.log