Version 1

[yaffs-website] / node_modules / grunt-legacy-log-utils / node_modules / lodash / _setData.js

diff --git a/node_modules/grunt-legacy-log-utils/node_modules/lodash/_setData.js b/node_modules/grunt-legacy-log-utils/node_modules/lodash/_setData.js
new file mode 100644 (file)
index 0000000..8b2efca
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+++ b/node_modules/grunt-legacy-log-utils/node_modules/lodash/_setData.js
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+var baseSetData = require('./_baseSetData'),
+    now = require('./now');
+
+/** Used to detect hot functions by number of calls within a span of milliseconds. */
+var HOT_COUNT = 150,
+    HOT_SPAN = 16;
+
+/**
+ * Sets metadata for `func`.
+ *
+ * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
+ * period of time, it will trip its breaker and transition to an identity function
+ * to avoid garbage collection pauses in V8. See [V8 issue 2070](https://code.google.com/p/v8/issues/detail?id=2070)
+ * for more details.
+ *
+ * @private
+ * @param {Function} func The function to associate metadata with.
+ * @param {*} data The metadata.
+ * @returns {Function} Returns `func`.
+ */
+var setData = (function() {
+  var count = 0,
+      lastCalled = 0;
+
+  return function(key, value) {
+    var stamp = now(),
+        remaining = HOT_SPAN - (stamp - lastCalled);
+
+    lastCalled = stamp;
+    if (remaining > 0) {
+      if (++count >= HOT_COUNT) {
+        return key;
+      }
+    } else {
+      count = 0;
+    }
+    return baseSetData(key, value);
+  };
+}());
+
+module.exports = setData;