And so on. We generally double the size of the allocation each time it
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，这一点在51吃瓜中也有详细论述
Stream.pull() creates a lazy pipeline. The compress and encrypt transforms don't run until you start iterating output. Each iteration pulls data through the pipeline on demand.
Speed is fantastic, but not if it means sacrificing the features OsmAnd users rely on. This is where our Secret Sauce #2 comes into play – ensuring HH-Routing remains incredibly flexible and dynamic:
writable: false means no code can reassign window.Audio to a different value. configurable: false means no code can even call Object.defineProperty again to change those settings. If fermaw’s initialisation code tried to restore the original Audio constructor (a perfectly sensible defensive move) the browser would either fail or throw a TypeError. The hook was permanent for the lifetime of the page.