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| var globalContainer = null; | |
| var replaceGlobalContainer = function() { | |
| var localRef = globalContainer; | |
| var unused = function () { | |
| // refering to localRef inside even unused function | |
| // puts it into replaceGlobalContainer call Context | |
| // it no longer is truly a "local" variable, it needs to | |
| // be pinned to the heap | |
| if (localRef) { | |
| console.log(""); | |
| } | |
| }; | |
| // we replace globalContainer reference by a new reference to a large object | |
| // old reference should now be garbage-collectable... | |
| globalContainer = { | |
| largeObj: new Array(10000000).join("*"), | |
| methodToRefContext: function () { | |
| // ... however the new reference has a method refering to | |
| // replaceGlobalContainer call Context, which refers to localRef | |
| // and makes old reference live forever | |
| console.log(""); | |
| } | |
| }; | |
| console.log("Heap size: %sMb", Math.floor(process.memoryUsage().heapTotal / 1024 / 1024)); | |
| }; | |
| var runAndReschedule = function () { | |
| replaceGlobalContainer(); | |
| setTimeout(runAndReschedule, 500); | |
| }; | |
| console.log("Pid: %s", process.pid); | |
| runAndReschedule(); |
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