memory leak example in levelup. Repeatedly getting the same key from leveldb. This will consume 100M in memory within 45 seconds, and continues to grow the more you call db.get()

gistfile1.js

var levelup = require('levelup')
 , crypto = require('crypto');

var db = levelup('./mydb', {cacheSize: 0});

// assuming this key exists
var str = "whatever";
var hash = crypto.createHash('md5').update( str ).digest("hex");

function sameGet(num){
  if( num == 0 ) return;

        db.get(hash, function(err,result){
                if( err )
                        console.log( err);

                return sameGet(--num);;
        });

}

sameGet(5000000);