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lib: rewrite AsyncLocalStorage without async_hooks #48528
lib: rewrite AsyncLocalStorage without async_hooks #48528
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Review requested:
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Also worth considering that as this no longer depends on |
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Some additional notes:
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Woo! Thanks for getting this started. The need for the flag is unfortunate but definitely required given how chromium is using the API and the conflict that causes with electron. But otherwise this should be a major improvement over the current state. Will do a thorough review this weekend. |
Another note: This currently uses a model of building a linked-list of AsyncContextFrames which each contain only the key and value they were constructed with. The alternative which is what was originally proposed was to use a map which is cloned from the parent frame at each frame construction and then the single additional entry for that frame is added but it is considered otherwise immutable. I went with the current model mostly because it was easier and made debugging simpler but I plan to spend some time benchmarking the two approaches to identify the trade-offs and figure out which approach would be generally better. The one definite downside to the current model is it holds past values for the same store from further up the call graph alive longer which may be undesirable but may only really apply to top-level scopes that will need to be kept alive anyway. Further analysis should provide some better insight into the behaviour. |
This is awesome!
That'd be a welcome change. We've been trying to eliminate async_hooks usage in our apps (as we've detected performance issues when async_hooks are misused), and having to import AsyncLocalStorage from the |
Thenables propagation fix is here: https://chromium-review.googlesource.com/c/v8/v8/+/4674242 |
I propose tagging this as semver-major. |
@mcollina Could do that. Though the way in which we land it is still not entirely decided. Due to the Electron conflict it needs build-flagging anyway, so this could be landed as a minor if it's by default turned off. It could land off by default and then have a follow-up to turn it on by default as a major. What do you think? |
That works |
I've got all but
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The This is essentially what |
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I'm going to just land this and start a follow-up PR with further improvements. What's here works, and I'd like to get it into users' hands sooner rather than later to start gathering feedback. The remaining suggestions are largely cosmetic, so I will just defer those to the follow-up rather than dealing with yet another round of CI flakiness and endless restarts. 😅 |
I accidentally added the |
Landed in d1229ee |
@Qard Hey! Did you ever get to benchmarking the change? |
Yep. See: #48528 (comment) |
@Qard thanks, this looks great! |
PR-URL: #48528 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]> Reviewed-By: Gerhard Stöbich <[email protected]>
Notable changes: buffer: * use fast API for writing one-byte strings (Robert Nagy) #54311 * optimize createFromString (Robert Nagy) #54324 * use native copy impl (Robert Nagy) #54087 inspector: * (SEMVER-MINOR) support `Network.loadingFailed` event (Kohei Ueno) #54246 lib: * (SEMVER-MINOR) rewrite AsyncLocalStorage without async_hooks (Stephen Belanger) #48528 module: * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 PR-URL: TODO
Notable changes: buffer: * use fast API for writing one-byte strings (Robert Nagy) #54311 * optimize createFromString (Robert Nagy) #54324 * use native copy impl (Robert Nagy) #54087 inspector: * (SEMVER-MINOR) support `Network.loadingFailed` event (Kohei Ueno) #54246 lib: * (SEMVER-MINOR) rewrite AsyncLocalStorage without async_hooks (Stephen Belanger) #48528 module: * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 PR-URL: #54452
Notable changes: buffer: * use fast API for writing one-byte strings (Robert Nagy) #54311 * optimize createFromString (Robert Nagy) #54324 * use native copy impl (Robert Nagy) #54087 inspector: * (SEMVER-MINOR) support `Network.loadingFailed` event (Kohei Ueno) #54246 lib: * (SEMVER-MINOR) rewrite AsyncLocalStorage without async_hooks (Stephen Belanger) #48528 module: * (SEMVER-MINOR) add --experimental-transform-types flag (Marco Ippolito) #54283 * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 PR-URL: #54452
Notable changes: buffer: * use fast API for writing one-byte strings (Robert Nagy) #54311 * optimize createFromString (Robert Nagy) #54324 * use native copy impl (Robert Nagy) #54087 inspector: * (SEMVER-MINOR) support `Network.loadingFailed` event (Kohei Ueno) #54246 lib: * (SEMVER-MINOR) rewrite AsyncLocalStorage without async_hooks (Stephen Belanger) #48528 module: * (SEMVER-MINOR) add --experimental-transform-types flag (Marco Ippolito) #54283 * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 PR-URL: #54452
Notable changes: buffer: * use fast API for writing one-byte strings (Robert Nagy) #54311 * optimize createFromString (Robert Nagy) #54324 * use native copy impl (Robert Nagy) #54087 inspector: * (SEMVER-MINOR) support `Network.loadingFailed` event (Kohei Ueno) #54246 lib: * (SEMVER-MINOR) rewrite AsyncLocalStorage without async_hooks (Stephen Belanger) #48528 module: * (SEMVER-MINOR) add --experimental-transform-types flag (Marco Ippolito) #54283 * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 PR-URL: #54452
* chore: bump Node.js to v22.9.0 * build: drop base64 dep in GN build nodejs/node#52856 * build,tools: make addons tests work with GN nodejs/node#50737 * fs: add fast api for InternalModuleStat nodejs/node#51344 * src: move package_json_reader cache to c++ nodejs/node#50322 * crypto: disable PKCS#1 padding for privateDecrypt nodejs-private/node-private#525 * src: move more crypto code to ncrypto nodejs/node#54320 * crypto: ensure valid point on elliptic curve in SubtleCrypto.importKey nodejs/node#50234 * src: shift more crypto impl details to ncrypto nodejs/node#54028 * src: switch crypto APIs to use Maybe<void> nodejs/node#54775 * crypto: remove DEFAULT_ENCODING nodejs/node#47182 * deps: update libuv to 1.47.0 nodejs/node#50650 * build: fix conflict gyp configs nodejs/node#53605 * lib,src: drop --experimental-network-imports nodejs/node#53822 * esm: align sync and async load implementations nodejs/node#49152 * esm: remove unnecessary toNamespacedPath calls nodejs/node#53656 * module: detect ESM syntax by trying to recompile as SourceTextModule nodejs/node#52413 * test: adapt debugger tests to V8 11.4 nodejs/node#49639 * lib: update usage of always on Atomics API nodejs/node#49639 * test: adapt test-fs-write to V8 internal changes nodejs/node#49639 * test: adapt to new V8 trusted memory spaces nodejs/node#50115 * deps: update libuv to 1.47.0 nodejs/node#50650 * src: use non-deprecated v8::Uint8Array::kMaxLength nodejs/node#50115 * src: update default V8 platform to override functions with location nodejs/node#51362 * src: add missing TryCatch nodejs/node#51362 * lib,test: handle new Iterator global nodejs/node#51362 * src: use non-deprecated version of CreateSyntheticModule nodejs/node#50115 * src: remove calls to recently deprecated V8 APIs nodejs/node#52996 * src: use new V8 API to define stream accessor nodejs/node#53084 * src: do not use deprecated V8 API nodejs/node#53084 * src: do not use soon-to-be-deprecated V8 API nodejs/node#53174 * src: migrate to new V8 interceptors API nodejs/node#52745 * src: use supported API to get stalled TLA messages nodejs/node#51362 * module: print location of unsettled top-level await in entry points nodejs/node#51999 * test: make snapshot comparison more flexible nodejs/node#54375 * test: do not set concurrency on parallelized runs nodejs/node#52177 * src: move FromNamespacedPath to path.cc nodejs/node#53540 * test: adapt to new V8 trusted memory spaces nodejs/node#50115 * build: add option to enable clang-cl on Windows nodejs/node#52870 * chore: fixup patch indices * chore: add/remove changed files * esm: drop support for import assertions nodejs/node#54890 * build: compile with C++20 support nodejs/node#52838 * deps: update nghttp2 to 1.62.1 nodejs/node#52966 * src: parse inspector profiles with simdjson nodejs/node#51783 * build: add GN build files nodejs/node#47637 * deps,lib,src: add experimental web storage nodejs/node#52435 * build: add missing BoringSSL dep * src: rewrite task runner in c++ nodejs/node#52609 * fixup! build: add GN build files * src: stop using deprecated fields of v8::FastApiCallbackOptions nodejs/node#54077 * fix: shadow variable * build: add back incorrectly removed SetAccessor patch * fixup! fixup! build: add GN build files * crypto: fix integer comparison in crypto for BoringSSL * src,lib: reducing C++ calls of esm legacy main resolve nodejs/node#48325 * src: move more crypto_dh.cc code to ncrypto nodejs/node#54459 * chore: fixup GN files for previous commit * src: move more crypto code to ncrypto nodejs/node#54320 * Fixup Perfetto ifdef guards * fix: missing electron_natives dep * fix: node_use_node_platform = false * fix: include src/node_snapshot_stub.cc in libnode * 5507047: [import-attributes] Remove support for import assertions https://chromium-review.googlesource.com/c/v8/v8/+/5507047 * fix: restore v8-sandbox.h in filenames.json * fix: re-add original-fs generation logic * fix: ngtcp2 openssl dep * test: try removing NAPI_VERSION undef * chore(deps): bump @types/node * src: move more crypto_dh.cc code to ncrypto nodejs/node#54459 * esm: remove unnecessary toNamespacedPath calls nodejs/node#53656 * buffer: fix out of range for toString nodejs/node#54553 * lib: rewrite AsyncLocalStorage without async_hooks nodejs/node#48528 * module: print amount of load time of a cjs module nodejs/node#52213 * test: skip reproducible snapshot test on 32-bit nodejs/node#53592 * fixup! src: move more crypto_dh.cc code to ncrypto * test: adjust emittedUntil return type * chore: remove redundant wpt streams patch * fixup! chore(deps): bump @types/node * fix: gn executable name on Windows * fix: build on Windows * fix: rename conflicting win32 symbols in //third_party/sqlite On Windows otherwise we get: lld-link: error: duplicate symbol: sqlite3_win32_write_debug >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:47987 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_sleep >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48042 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_is_nt >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48113 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_utf8_to_unicode >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48470 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_unicode_to_utf8 >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48486 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_mbcs_to_utf8 >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48502 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_mbcs_to_utf8_v2 >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48518 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_utf8_to_mbcs >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48534 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj lld-link: error: duplicate symbol: sqlite3_win32_utf8_to_mbcs_v2 >>> defined at .\..\..\third_party\electron_node\deps\sqlite\sqlite3.c:48550 >>> obj/third_party/electron_node/deps/sqlite/sqlite/sqlite3.obj >>> defined at obj/third_party/sqlite\chromium_sqlite3/sqlite3_shim.obj * docs: remove unnecessary ts-expect-error after types bump * src: move package resolver to c++ nodejs/node#50322 * build: set ASAN detect_container_overflow=0 nodejs/node#55584 * chore: fixup rebase * test: disable failing ASAN test * win: almost fix race detecting ESRCH in uv_kill libuv/libuv#4341
I'm working on rewriting AsyncLocalStorage to use v8::SetContinuationPreservedEmbedderData(...) in a similar model to Cloudflare and in anticipation of the upcoming AsyncContext proposal.
This is not done yet but is mostly working as-is. I have not got to benchmarking or writing tests for it yet, but it seems to be passing most of the existing AsyncLocalStorage. 😄
cc @nodejs/diagnostics @nodejs/performance