Function getPooledTraverseContext

docs/external/js/react.development.js:1022–1040

(mapResult, keyPrefix, mapFunction, mapContext)

  var traverseContextPool = [];

  function getPooledTraverseContext(mapResult, keyPrefix, mapFunction, mapContext) {
    if (traverseContextPool.length) {
      var traverseContext = traverseContextPool.pop();
      traverseContext.result = mapResult;
      traverseContext.keyPrefix = keyPrefix;
      traverseContext.func = mapFunction;
      traverseContext.context = mapContext;
      traverseContext.count = 0;
      return traverseContext;
    } else {
      return {
        result: mapResult,
        keyPrefix: keyPrefix,
        func: mapFunction,
        context: mapContext,
        count: 0
      };
    }
  }

  function releaseTraverseContext(traverseContext) {
    traverseContext.result = null;