Web Inspector now includes two new timelines for debugging a webpage’s memory usage. The first is a high-level Memory timeline intended to help developers to better understand the memory characteristics of their webpages, to identify spikes, and to detect general memory growth. The second is a detailed JavaScript Allocations timeline that allows developers to record, compare, and analyze snapshots
![Memory Debugging with Web Inspector](https://cdn-ak-scissors.b.st-hatena.com/image/square/7969c1ca1699af10ecbf1a83e7c08f5990f62c8e/height=288;version=1;width=512/https%3A%2F%2Fwebkit.org%2Fwp-content%2Fuploads%2FMemory-Timeline-1024x883.png)