delta/node-new.git/src/async_wrap.cc, branch docs-fix

async_hooks: fix id assignment in fast-path promise hook

2020-08-03T07:36:25+00:00

Native side of fast-path promise hook was not calling JS
fastPromiseHook function when there were no async ids
previously assigned to the promise. Because of that already
created promises could not get id assigned in situations
when an async hook without a before listener function is
enabled after their creation. As the result executionAsyncId
could return wrong id when called within promise's .then().

Refs: https://github.com/nodejs/node/pull/34512

PR-URL: https://github.com/nodejs/node/pull/34548
Reviewed-By: Anna Henningsen 
Reviewed-By: Benjamin Gruenbaum 
Reviewed-By: Gerhard Stöbich

async_hooks: execute destroy hooks earlier

2020-08-02T21:13:42+00:00

Use a microtask to call destroy hooks in case there are a lot queued
as immediate may be scheduled late in case of long running
promise chains.

Queuing a mircrotasks in GC context is not allowed therefore an
interrupt is triggered to do this in JS context as fast as possible.

fixes: https://github.com/nodejs/node/issues/34328
refs: https://github.com/nodejs/node/issues/33896

PR-URL: https://github.com/nodejs/node/pull/34342
Fixes: https://github.com/nodejs/node/issues/34328
Refs: https://github.com/nodejs/node/issues/33896
Reviewed-By: Gus Caplan 
Reviewed-By: Anna Henningsen 
Reviewed-By: Ben Noordhuis 
Reviewed-By: James M Snell

async_hooks: optimize fast-path promise hook for ALS

2020-07-28T07:54:01+00:00

Remove unnecessary native-to-JS code switches in fast-path for
PromiseHooks. Those switches happen even if a certain type of
hook (say, before) is not installed, which may lead to sub-optimal
performance in the AsyncLocalStorage scenario, i.e. when there is
only an init hook.

PR-URL: https://github.com/nodejs/node/pull/34512
Reviewed-By: Anna Henningsen 
Reviewed-By: Benjamin Gruenbaum 
Reviewed-By: David Carlier

src: snapshot node

2020-07-18T03:23:21+00:00

This runs `lib/internal/bootstrap/node.js` before creating
the builtin snapshot and deserialize the loaders from the
snapshot in deserialization mode.

PR-URL: https://github.com/nodejs/node/pull/32984
Reviewed-By: Anna Henningsen 
Reviewed-By: Daniel Bevenius

async_hooks: improve resource stack performance

2020-07-14T11:14:27+00:00

Removes some of the performance overhead that came with
`executionAsyncResource()` by using the JS resource array
only as a cache for the values provided by C++. The fact that we now
use an entry trampoline is used to pass the resource without
requiring extra C++/JS boundary crossings, and the direct accesses
to the JS resource array from C++ are removed in all fast paths.

This particularly improves performance when async hooks are not
being used.

This is a continuation of https://github.com/nodejs/node/pull/33575
and shares some of its code with it.

    ./node benchmark/compare.js --new ./node --old ./node-master --runs 30 --filter messageport worker | Rscript benchmark/compare.R
    [00:06:14|% 100| 1/1 files | 60/60 runs | 2/2 configs]: Done
                                                       confidence improvement accuracy (*)    (**)   (***)
     worker/messageport.js n=1000000 payload='object'         **     12.64 %       ±7.30%  ±9.72% ±12.65%
     worker/messageport.js n=1000000 payload='string'          *     11.08 %       ±9.00% ±11.98% ±15.59%

    ./node benchmark/compare.js --new ./node --old ./node-master --runs 20 --filter async-resource-vs-destroy async_hooks | Rscript benchmark/compare.R
    [00:22:35|% 100| 1/1 files | 40/40 runs | 6/6 configs]: Done
                                                                                                                                                                         confidence improvement accuracy (*)
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='async' type='async-local-storage' benchmarker='autocannon'                     1.60 %       ±7.35%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='async' type='async-resource' benchmarker='autocannon'                          6.05 %       ±6.57%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='async' type='destroy' benchmarker='autocannon'                          *      8.27 %       ±7.50%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='callbacks' type='async-local-storage' benchmarker='autocannon'                 7.42 %       ±8.22%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='callbacks' type='async-resource' benchmarker='autocannon'                      4.33 %       ±7.84%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='callbacks' type='destroy' benchmarker='autocannon'                             5.96 %       ±7.15%
                                                                                                                                                                           (**)   (***)
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='async' type='async-local-storage' benchmarker='autocannon'      ±9.84% ±12.94%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='async' type='async-resource' benchmarker='autocannon'           ±8.81% ±11.60%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='async' type='destroy' benchmarker='autocannon'                 ±10.07% ±13.28%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='callbacks' type='async-local-storage' benchmarker='autocannon' ±11.01% ±14.48%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='callbacks' type='async-resource' benchmarker='autocannon'      ±10.50% ±13.81%
     async_hooks/async-resource-vs-destroy.js n=1000000 duration=5 connections=500 path='/' asyncMethod='callbacks' type='destroy' benchmarker='autocannon'              ±9.58% ±12.62%

Refs: https://github.com/nodejs/node/pull/33575

PR-URL: https://github.com/nodejs/node/pull/34319
Reviewed-By: Matteo Collina 
Reviewed-By: James M Snell 
Reviewed-By: Gerhard Stöbich 
Reviewed-By: Stephen Belanger

async_hooks: callback trampoline for MakeCallback

2020-06-19T15:37:25+00:00

PR-URL: https://github.com/nodejs/node/pull/33801
Reviewed-By: Anna Henningsen 
Reviewed-By: Vladimir de Turckheim 
Reviewed-By: Gus Caplan 
Reviewed-By: Andrey Pechkurov 
Reviewed-By: Gerhard Stöbich

src: introduce BaseObject base FunctionTemplate

2020-06-14T12:53:38+00:00

PR-URL: https://github.com/nodejs/node/pull/33772
Reviewed-By: Benjamin Gruenbaum

src: remove unused using declarations

2020-05-28T14:02:14+00:00

This commit removes the unused using declarations reported by lint-cpp.

PR-URL: https://github.com/nodejs/node/pull/33268
Refs: https://github.com/nodejs/node/issues/29226
Reviewed-By: Ben Noordhuis 
Reviewed-By: Ruben Bridgewater 
Reviewed-By: Christian Clauss 
Reviewed-By: Daniel Bevenius 
Reviewed-By: Beth Griggs

src: use enum for refed flag on native immediates

2020-05-22T00:47:56+00:00

Refs: https://github.com/nodejs/node/pull/33320#discussion_r423141443

PR-URL: https://github.com/nodejs/node/pull/33444
Reviewed-By: James M Snell 
Reviewed-By: Zeyu Yang 
Reviewed-By: Colin Ihrig 
Reviewed-By: David Carlier 
Reviewed-By: Ben Noordhuis

src: use symbol to store `AsyncWrap` resource

2020-05-22T00:45:09+00:00

Use a symbol on the bindings object to store the public resource object,
rather than a `v8::Global` Persistent. This has several advantages:

- It’s harder to inadvertently create memory leaks this way.
  The garbage collector sees the `AsyncWrap` →  resource link like
  a regular JS property, and can collect the objects as a group,
  even if the resource object should happen to point back to the
  `AsyncWrap` object.
- This will make it easier in the future to use `owner_symbol` for
  this purpose, which is generally the direction we should be moving
  the `async_hooks` API into (i.e. using more public objects instead
  of letting internal wires stick out).

PR-URL: https://github.com/nodejs/node/pull/31745
Reviewed-By: Stephen Belanger 
Reviewed-By: David Carlier 
Reviewed-By: Denys Otrishko 
Reviewed-By: Chengzhong Wu 
Reviewed-By: Benjamin Gruenbaum 
Reviewed-By: James M Snell 
Reviewed-By: Minwoo Jung 
Reviewed-By: Colin Ihrig 
Reviewed-By: Franziska Hinkelmann 
Reviewed-By: Gerhard Stöbich