gc-hacks/index.js

Collection of ugly hacks, for JS garbage collector. Use only as a last resort.

'use strict';

// Return a copy of the given value, taking a predictable amount of space.
function recreateValue(jsonCompatibleData) {
  var str = JSON.stringify(jsonCompatibleData);
  return JSON.parse(exports.forceStringCopy(str));
}
exports.recreateValue = recreateValue;

function gcCollect() {
  if(typeof global.gc !== 'function')
    throw Error('You should expose GC, run Node with "--expose-gc".');
  global.gc();
}
exports.gcCollect = gcCollect;

function forceStringCopy(str) {
  if (typeof str !== 'string')
    return str;
  return (' ' + str).substr(1);
}
exports.forceStringCopy = forceStringCopy;

function recreateReturnObjectAndGcCollect(fn) {
  return function wrapper() {
    var str = JSON.stringify(fn.apply(this, arguments))
    str = exports.forceStringCopy(str);

    exports.gcCollect();

    return JSON.parse(str);
  }
}
exports.recreateReturnObjectAndGcCollect = recreateReturnObjectAndGcCollect;