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nodejs/test/code-cache/testcfg.py

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build: speed up startup with V8 code cache This patch speeds up the startup time and reduce the startup memory footprint by using V8 code cache when comiling builtin modules. The current approach is demonstrated in the `with-code-cache` Makefile target (no corresponding Windows target at the moment). 1. Build the binary normally (`src/node_code_cache_stub.cc` is used), by now `internalBinding('code_cache')` is an empty object 2. Run `tools/generate_code_cache.js` with the binary, which generates the code caches by reading source code of builtin modules off source code exposed by `require('internal/bootstrap/cache').builtinSource` and then generate a C++ file containing static char arrays of the code cache, using a format similar to `node_javascript.cc` 3. Run `configure` with the `--code-cache-path` option so that the newly generated C++ file will be used when compiling the new binary. The generated C++ file will put the cache into the `internalBinding('code_cache')` object with the module ids as keys 4. The new binary tries to read the code cache from `internalBinding('code_cache')` and use it to compile builtin modules. If the cache is used, it will put the id into `require('internal/bootstrap/cache').compiledWithCache` for bookkeeping, otherwise the id will be pushed into `require('internal/bootstrap/cache').compiledWithoutCache` This patch also added tests that verify the code cache is generated and used when compiling builtin modules. The binary with code cache: - Is ~1MB bigger than the binary without code cahe - Consumes ~1MB less memory during start up - Starts up about 60% faster PR-URL: https://github.com/nodejs/node/pull/21405 Reviewed-By: John-David Dalton <john.david.dalton@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gus Caplan <me@gus.host>
2018-06-18 19:02:57 +02:00
import sys, os
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
import testpy
def GetConfiguration(context, root):
return testpy.ParallelTestConfiguration(context, root, 'code-cache')
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