hybrid-disk-cache/dist/bench.js

A hybrid disk cache utilize both the database and the file system.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var _1 = __importDefault(require("."));
function log(start, count) {
    var _a = process.hrtime(start), secs = _a[0], ns = _a[1];
    var ms = ns / 1000;
    var speed = (secs * 1000000 + ms) / count;
    console.log('  done: %s μs/record.', speed.toFixed(2));
}
function benchData(size) {
    if (size === void 0) { size = 6; }
    var base = [1, 2, 5];
    // from 10B to 5MB
    var full = new Array(size)
        .fill(0)
        .flatMap(function (_, exp) { return base.map(function (b) { return b * Math.pow(10, exp); }); })
        .map(function (i) { return Buffer.from(new Array(i).fill(0)); });
    return full;
}
function benchWrite(cache, batch, size) {
    if (size === void 0) { size = 6; }
    console.log('> generating bench data from 10B to %sB', 5 * Math.pow(10, size));
    var full = benchData(size);
    var count = 0;
    console.log('> starting %s x %s writes', batch, full.length);
    var start = process.hrtime();
    for (var i = 0; i < batch; i++) {
        for (var j = 0; j < full.length; j++) {
            cache.set('key-' + j, full[j]);
            count += 1;
        }
    }
    log(start, count);
    return full.map(function (_, i) { return 'key-' + i; });
}
function benchRead(cache, batch, keys) {
    var count = 0;
    console.log('> starting %s x %s reads', batch, keys.length);
    var start = process.hrtime();
    for (var i = 0; i < batch; i++) {
        for (var _i = 0, keys_1 = keys; _i < keys_1.length; _i++) {
            var key = keys_1[_i];
            cache.get(key);
            count += 1;
        }
    }
    log(start, count);
}
if (require.main === module) {
    var cache = new _1.default();
    console.log('> cache located at: %s', cache.path);
    var batch = 3000;
    var keys = benchWrite(cache, batch, 5);
    benchRead(cache, batch, keys);
}