![]() ![]() We also pointed out that although the high-level pipeline is similar between engines, there are often differences in the optimization pipeline. Our previous article discussed how modern JavaScript engines all have the same overall pipeline: Optimization tiers and execution trade-offs Note: If you prefer watching a presentation over reading articles, then enjoy the video below! If not, skip the video and read on. This article explains optimization pipeline trade-offs and describes how engines speed up accesses to prototype properties. Previously, we discussed how JavaScript engines optimize object and array access through the use of Shapes and Inline Caches. As a JavaScript developer, having a deeper understanding of how JavaScript engines work helps you reason about the performance characteristics of your code. This article describes some key fundamentals that are common to all JavaScript engines - and not just V8, the engine the authors ( Benedikt and Mathias) work on.
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