A quick little stress test for nodejs level module. On windows this eventually comes to a crawl, and dies with a out-of-memory exception.

leveldb-stress-test.js

var levelup = require('level');
var db = levelup('./leakydb', {valueEncoding: 'json'});

var BATCH_SIZE = 10000
var BATCH_STARTING_ITERATION = 1000; // start at a high number to make it a bit easier on leveldb puts (1001, 1010, 1100 is more sort friendly than 1, 10, 100)
var BATCH_END_ITERATION = 2000;

var batchIteration = BATCH_STARTING_ITERATION;
var putBatch = function () {
  var ops = [];
	for (var i = 0; i < BATCH_SIZE; i++) {
		var d = new Date();
		var key = "aKeyLabel~" + batchIteration + "~" + i + "~" + d;
		var value = {
				batchIteration: batchIteration,
				i: i,
				createdDate: new Date(),
				someText: "I think level for windows leaks memory :("
			};
		ops.push({type: "put", key: key, value: value});
	};
	db.batch(ops, function (err) {
		if (err) {
			console.log(err);
		} else {
			var actualIteration = batchIteration - BATCH_STARTING_ITERATION;
			var recordsPut = actualIteration * BATCH_SIZE;
			console.log(recordsPut + " records put   " + new Date());
			batchIteration = batchIteration + 1;
			if (batchIteration < BATCH_END_ITERATION) {
				putBatch();
			} else {
				console.log('we made it!');
			}
		}
	});
};
putBatch();