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CHANGELOG.md | 2 lat temu | |
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package.json | 2 lat temu | |
v8-compile-cache.js | 2 lat temu |
v8-compile-cache
attaches a require
hook to use V8's code cache to speed up instantiation time. The "code cache" is the work of parsing and compiling done by V8.
The ability to tap into V8 to produce/consume this cache was introduced in Node v5.7.0.
$ npm install --save v8-compile-cache
require('v8-compile-cache');
Requiring v8-compile-cache
in Node <5.7.0 is a noop – but you need at least Node 4.0.0 to support the ES2015 syntax used by v8-compile-cache
.
Set the environment variable DISABLE_V8_COMPILE_CACHE=1
to disable the cache.
Cache directory is defined by environment variable V8_COMPILE_CACHE_CACHE_DIR
or defaults to <os.tmpdir()>/v8-compile-cache-<V8_VERSION>
.
Cache files are suffixed .BLOB
and .MAP
corresponding to the entry module that required v8-compile-cache
. The cache is entry module specific because it is faster to load the entire code cache into memory at once, than it is to read it from disk on a file-by-file basis.
See https://github.com/zertosh/v8-compile-cache/tree/master/bench.
Load Times:
Module | Without Cache | With Cache |
---|---|---|
babel-core |
218ms |
185ms |
yarn |
153ms |
113ms |
yarn (bundled) |
228ms |
105ms |
^ Includes the overhead of loading the cache itself.
FileSystemBlobStore
and NativeCompileCache
are based on Atom's implementation of their v8 compile cache:
mkdirpSync
is based on: