node/benchmark/fast_buffer2.js at master · objcode/node · GitHub

42 lines (34 loc) · 1010 Bytes

var SlowBuffer = require('buffer').SlowBuffer;

var POOLSIZE = 8*1024;

var pool;

function allocPool () {

pool = new SlowBuffer(POOLSIZE);

pool.used = 0;

}

function FastBuffer (length) {

this.length = length;

if (length > POOLSIZE) {

// Big buffer, just alloc one.

this.parent = new Buffer(length);

this.offset = 0;

} else {

// Small buffer.

if (!pool || pool.length - pool.used < length) allocPool();

this.parent = pool;

this.offset = pool.used;

pool.used += length;

}

// HERE HERE HERE

SlowBuffer.makeFastBuffer(this.parent, this, this.offset, this.length);

}

exports.FastBuffer = FastBuffer;

FastBuffer.prototype.get = function (i) {

if (i < 0 || i >= this.length) throw new Error("oob");

return this.parent[this.offset + i];

};

FastBuffer.prototype.set = function (i, v) {

if (i < 0 || i >= this.length) throw new Error("oob");

return this.parent[this.offset + i] = v;

};

// TODO define slice, toString, write, etc.

// slice should not use c++

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