v8-perf
Notes and resources related to V8 and thus Node.js performance.
Table of Contents generated with DocToc
Topics
Data Types
The data types document explains what data types V8 uses under the hood to
store JavaScript data and how it relates to the performance of your code.
Compiler
The V8 compiler document outlines the V8 compiler pipeline including the
Ignition Interpreter and TurboFan optimizing compiler. It explains how information about your
code is executed to allow optimizations, how and when deoptimizations occur and how features
like the CodeStubAssembler allowed reducing performance bottlenecks found in the older
pipeline.
Language Features
The language features document lists JavaScript language features and
provides info with regard to their performance mainly to provide assurance that performance of
most features is no longer an issue as it was with the previous compiler pipeline.
Garbage Collector
The V8 garbage collector document talks about how memory is organized on the V8 heap,
how garbage collection is performed and how it was parallelized as much as possible to avoid
pausing the main thread more than necessary.
Memory Profiling
The memory profiling document explains how JavaScript objects are
referenced to form a tree of nodes which the garbage collector uses to determine collectable
objects. It also outlines numerous techniques to profile memory leaks and allocations.
Inspection and Performance Profiling
Inside the inspection document you will find techniques that allow you to
profile your Node.js or web app, how to produce flamegraphs and what flags and tools are
available to gain an insight into operations of V8 itself.
Snapshots and Code Caching
This document includes information as to how V8 uses caching
techniques in order to avoid recompiling scripts during initialization and thus achieve faster
startup times.
Runtime Functions
The runtime functions document gives a quick intro into C++ functions
accessible from JavaScript that can be used to provide information of the V8 engine as well as
direct it to take a specific action like optimize a function on next call.
V8 source and documentation
It's best to dig into the source to confirm assumptions about V8 performance first hand.
source
source documentation
Documented V8 source code for specific versions of Node.js can be found on the v8docs
page.
LICENSE
MIT