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Diffstat (limited to 'node_modules/v8-compile-cache')
| -rw-r--r-- | node_modules/v8-compile-cache/CHANGELOG.md | 31 | ||||
| -rw-r--r-- | node_modules/v8-compile-cache/README.md | 53 | ||||
| -rw-r--r-- | node_modules/v8-compile-cache/package.json | 28 | ||||
| -rw-r--r-- | node_modules/v8-compile-cache/v8-compile-cache.js | 351 |
4 files changed, 0 insertions, 463 deletions
diff --git a/node_modules/v8-compile-cache/CHANGELOG.md b/node_modules/v8-compile-cache/CHANGELOG.md deleted file mode 100644 index e6298a18..00000000 --- a/node_modules/v8-compile-cache/CHANGELOG.md +++ /dev/null @@ -1,31 +0,0 @@ -# `v8-module-cache` Changelog - -## 2018-08-06, Version 2.0.2 - -* Re-publish. - -## 2018-08-06, Version 2.0.1 - -* Support `require.resolve` options (added in Node v8.9.0). - -## 2018-04-30, Version 2.0.0 - -* Use `Buffer.alloc` instead of `new Buffer()`. -* Drop support for Node 5.x. - -## 2018-01-23, Version 1.1.2 - -* Instead of checking for `process.versions.v8`, check that `script.cachedDataProduced` is `true` (rather than `null`/`undefined`) for support to be considered existent. - -## 2018-01-23, Version 1.1.1 - -* Check for the existence of `process.versions.v8` before attaching hook (see [f8b0388](https://github.com/zertosh/v8-compile-cache/commit/f8b038848be94bc2c905880dd50447c73393f364)). - -## 2017-03-27, Version 1.1.0 - -* Safer cache directory creation (see [bcb3b12](https://github.com/zertosh/v8-compile-cache/commit/bcb3b12c819ab0927ec4408e70f612a6d50a9617)). - - The cache is now suffixed with the user's uid on POSIX systems (i.e. `/path/to/tmp/v8-compile-cache-1234`). - -## 2017-02-21, Version 1.0.0 - -* Initial release. diff --git a/node_modules/v8-compile-cache/README.md b/node_modules/v8-compile-cache/README.md deleted file mode 100644 index 9580f694..00000000 --- a/node_modules/v8-compile-cache/README.md +++ /dev/null @@ -1,53 +0,0 @@ -# v8-compile-cache - -[](https://travis-ci.org/zertosh/v8-compile-cache) - -`v8-compile-cache` attaches a `require` hook to use [V8's code cache](https://v8project.blogspot.com/2015/07/code-caching.html) 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](https://nodejs.org/en/blog/release/v5.7.0/). - -## Usage - -1. Add the dependency: - - ```sh - $ npm install --save v8-compile-cache - ``` - -2. Then, in your entry module add: - - ```js - 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`.** - -## Options - -Set the environment variable `DISABLE_V8_COMPILE_CACHE=1` to disable the cache. - -## Internals - -The caches are stored in `$TMP/v8-compile-cache/V8_VERSION`, where there are `.BLOB` and `.MAP` files 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. - -## Benchmarks - -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._ - -## Acknowledgements - -* `FileSystemBlobStore` and `NativeCompileCache` are based on Atom's implementation of their v8 compile cache: - - https://github.com/atom/atom/blob/b0d7a8a/src/file-system-blob-store.js - - https://github.com/atom/atom/blob/b0d7a8a/src/native-compile-cache.js -* `mkdirpSync` is based on: - - https://github.com/substack/node-mkdirp/blob/f2003bb/index.js#L55-L98 diff --git a/node_modules/v8-compile-cache/package.json b/node_modules/v8-compile-cache/package.json deleted file mode 100644 index 87dd7b04..00000000 --- a/node_modules/v8-compile-cache/package.json +++ /dev/null @@ -1,28 +0,0 @@ -{ - "name": "v8-compile-cache", - "version": "2.0.2", - "description": "Require hook for automatic V8 compile cache persistence", - "main": "v8-compile-cache.js", - "scripts": { - "bench": "bench/run.sh", - "lint": "eslint --max-warnings=0 .", - "test": "tap test/*-test.js" - }, - "author": "Andres Suarez <zertosh@gmail.com>", - "files": [ - "v8-compile-cache.js" - ], - "license": "MIT", - "dependencies": {}, - "devDependencies": { - "babel-core": "6.23.1", - "eslint": "^3.15.0", - "flow-parser": "0.38.0", - "rimraf": "^2.5.4", - "rxjs": "5.2.0", - "semver": "^5.3.0", - "tap": "^10.1.1", - "temp": "^0.8.3", - "yarn": "0.20.3" - } -} diff --git a/node_modules/v8-compile-cache/v8-compile-cache.js b/node_modules/v8-compile-cache/v8-compile-cache.js deleted file mode 100644 index d496ff15..00000000 --- a/node_modules/v8-compile-cache/v8-compile-cache.js +++ /dev/null @@ -1,351 +0,0 @@ -'use strict'; - -const Module = require('module'); -const crypto = require('crypto'); -const fs = require('fs'); -const path = require('path'); -const vm = require('vm'); -const os = require('os'); - -const hasOwnProperty = Object.prototype.hasOwnProperty; - -//------------------------------------------------------------------------------ -// FileSystemBlobStore -//------------------------------------------------------------------------------ - -class FileSystemBlobStore { - constructor(directory, prefix) { - const name = prefix ? slashEscape(prefix + '.') : ''; - this._blobFilename = path.join(directory, name + 'BLOB'); - this._mapFilename = path.join(directory, name + 'MAP'); - this._lockFilename = path.join(directory, name + 'LOCK'); - this._directory = directory; - this._load(); - } - - has(key, invalidationKey) { - if (hasOwnProperty.call(this._memoryBlobs, key)) { - return this._invalidationKeys[key] === invalidationKey; - } else if (hasOwnProperty.call(this._storedMap, key)) { - return this._storedMap[key][0] === invalidationKey; - } - return false; - } - - get(key, invalidationKey) { - if (hasOwnProperty.call(this._memoryBlobs, key)) { - if (this._invalidationKeys[key] === invalidationKey) { - return this._memoryBlobs[key]; - } - } else if (hasOwnProperty.call(this._storedMap, key)) { - const mapping = this._storedMap[key]; - if (mapping[0] === invalidationKey) { - return this._storedBlob.slice(mapping[1], mapping[2]); - } - } - } - - set(key, invalidationKey, buffer) { - this._invalidationKeys[key] = invalidationKey; - this._memoryBlobs[key] = buffer; - this._dirty = true; - } - - delete(key) { - if (hasOwnProperty.call(this._memoryBlobs, key)) { - this._dirty = true; - delete this._memoryBlobs[key]; - } - if (hasOwnProperty.call(this._invalidationKeys, key)) { - this._dirty = true; - delete this._invalidationKeys[key]; - } - if (hasOwnProperty.call(this._storedMap, key)) { - this._dirty = true; - delete this._storedMap[key]; - } - } - - isDirty() { - return this._dirty; - } - - save() { - const dump = this._getDump(); - const blobToStore = Buffer.concat(dump[0]); - const mapToStore = JSON.stringify(dump[1]); - - try { - mkdirpSync(this._directory); - fs.writeFileSync(this._lockFilename, 'LOCK', {flag: 'wx'}); - } catch (error) { - // Swallow the exception if we fail to acquire the lock. - return false; - } - - try { - fs.writeFileSync(this._blobFilename, blobToStore); - fs.writeFileSync(this._mapFilename, mapToStore); - } catch (error) { - throw error; - } finally { - fs.unlinkSync(this._lockFilename); - } - - return true; - } - - _load() { - try { - this._storedBlob = fs.readFileSync(this._blobFilename); - this._storedMap = JSON.parse(fs.readFileSync(this._mapFilename)); - } catch (e) { - this._storedBlob = Buffer.alloc(0); - this._storedMap = {}; - } - this._dirty = false; - this._memoryBlobs = {}; - this._invalidationKeys = {}; - } - - _getDump() { - const buffers = []; - const newMap = {}; - let offset = 0; - - function push(key, invalidationKey, buffer) { - buffers.push(buffer); - newMap[key] = [invalidationKey, offset, offset + buffer.length]; - offset += buffer.length; - } - - for (const key of Object.keys(this._memoryBlobs)) { - const buffer = this._memoryBlobs[key]; - const invalidationKey = this._invalidationKeys[key]; - push(key, invalidationKey, buffer); - } - - for (const key of Object.keys(this._storedMap)) { - if (hasOwnProperty.call(newMap, key)) continue; - const mapping = this._storedMap[key]; - const buffer = this._storedBlob.slice(mapping[1], mapping[2]); - push(key, mapping[0], buffer); - } - - return [buffers, newMap]; - } -} - -//------------------------------------------------------------------------------ -// NativeCompileCache -//------------------------------------------------------------------------------ - -class NativeCompileCache { - constructor() { - this._cacheStore = null; - this._previousModuleCompile = null; - } - - setCacheStore(cacheStore) { - this._cacheStore = cacheStore; - } - - install() { - const self = this; - this._previousModuleCompile = Module.prototype._compile; - Module.prototype._compile = function(content, filename) { - const mod = this; - function require(id) { - return mod.require(id); - } - require.resolve = function(request, options) { - return Module._resolveFilename(request, mod, false, options); - }; - require.main = process.mainModule; - - // Enable support to add extra extension types - require.extensions = Module._extensions; - require.cache = Module._cache; - - const dirname = path.dirname(filename); - - const compiledWrapper = self._moduleCompile(filename, content); - - // We skip the debugger setup because by the time we run, node has already - // done that itself. - - const args = [mod.exports, require, mod, filename, dirname, process, global]; - return compiledWrapper.apply(mod.exports, args); - }; - } - - uninstall() { - Module.prototype._compile = this._previousModuleCompile; - } - - _moduleCompile(filename, content) { - // https://github.com/nodejs/node/blob/v7.5.0/lib/module.js#L511 - - // Remove shebang - var contLen = content.length; - if (contLen >= 2) { - if (content.charCodeAt(0) === 35/*#*/ && - content.charCodeAt(1) === 33/*!*/) { - if (contLen === 2) { - // Exact match - content = ''; - } else { - // Find end of shebang line and slice it off - var i = 2; - for (; i < contLen; ++i) { - var code = content.charCodeAt(i); - if (code === 10/*\n*/ || code === 13/*\r*/) break; - } - if (i === contLen) { - content = ''; - } else { - // Note that this actually includes the newline character(s) in the - // new output. This duplicates the behavior of the regular - // expression that was previously used to replace the shebang line - content = content.slice(i); - } - } - } - } - - // create wrapper function - var wrapper = Module.wrap(content); - - var invalidationKey = crypto - .createHash('sha1') - .update(content, 'utf8') - .digest('hex'); - - var buffer = this._cacheStore.get(filename, invalidationKey); - - var script = new vm.Script(wrapper, { - filename: filename, - lineOffset: 0, - displayErrors: true, - cachedData: buffer, - produceCachedData: true, - }); - - if (script.cachedDataProduced) { - this._cacheStore.set(filename, invalidationKey, script.cachedData); - } else if (script.cachedDataRejected) { - this._cacheStore.delete(filename); - } - - var compiledWrapper = script.runInThisContext({ - filename: filename, - lineOffset: 0, - columnOffset: 0, - displayErrors: true, - }); - - return compiledWrapper; - } -} - -//------------------------------------------------------------------------------ -// utilities -// -// https://github.com/substack/node-mkdirp/blob/f2003bb/index.js#L55-L98 -// https://github.com/zertosh/slash-escape/blob/e7ebb99/slash-escape.js -//------------------------------------------------------------------------------ - -function mkdirpSync(p_) { - _mkdirpSync(path.resolve(p_), parseInt('0777', 8) & ~process.umask()); -} - -function _mkdirpSync(p, mode) { - try { - fs.mkdirSync(p, mode); - } catch (err0) { - if (err0.code === 'ENOENT') { - _mkdirpSync(path.dirname(p)); - _mkdirpSync(p); - } else { - try { - const stat = fs.statSync(p); - if (!stat.isDirectory()) { throw err0; } - } catch (err1) { - throw err0; - } - } - } -} - -function slashEscape(str) { - const ESCAPE_LOOKUP = { - '\\': 'zB', - ':': 'zC', - '/': 'zS', - '\x00': 'z0', - 'z': 'zZ', - }; - return str.replace(/[\\:\/\x00z]/g, match => (ESCAPE_LOOKUP[match])); -} - -function supportsCachedData() { - const script = new vm.Script('""', {produceCachedData: true}); - // chakracore, as of v1.7.1.0, returns `false`. - return script.cachedDataProduced === true; -} - -function getCacheDir() { - // Avoid cache ownership issues on POSIX systems. - const dirname = typeof process.getuid === 'function' - ? 'v8-compile-cache-' + process.getuid() - : 'v8-compile-cache'; - const version = typeof process.versions.v8 === 'string' - ? process.versions.v8 - : typeof process.versions.chakracore === 'string' - ? 'chakracore-' + process.versions.chakracore - : 'node-' + process.version; - const cacheDir = path.join(os.tmpdir(), dirname, version); - return cacheDir; -} - -function getParentName() { - // `module.parent.filename` is undefined or null when: - // * node -e 'require("v8-compile-cache")' - // * node -r 'v8-compile-cache' - // * Or, requiring from the REPL. - const parentName = module.parent && typeof module.parent.filename === 'string' - ? module.parent.filename - : process.cwd(); - return parentName; -} - -//------------------------------------------------------------------------------ -// main -//------------------------------------------------------------------------------ - -if (!process.env.DISABLE_V8_COMPILE_CACHE && supportsCachedData()) { - const cacheDir = getCacheDir(); - const prefix = getParentName(); - const blobStore = new FileSystemBlobStore(cacheDir, prefix); - - const nativeCompileCache = new NativeCompileCache(); - nativeCompileCache.setCacheStore(blobStore); - nativeCompileCache.install(); - - process.once('exit', code => { - if (blobStore.isDirty()) { - blobStore.save(); - } - nativeCompileCache.uninstall(); - }); -} - -module.exports.__TEST__ = { - FileSystemBlobStore, - NativeCompileCache, - mkdirpSync, - slashEscape, - supportsCachedData, - getCacheDir, - getParentName, -}; |