Replace piscina with tinypool

package.json

@@ -19,8 +19,8 @@
     "jest-each": "^30.0.0-alpha.1",
     "jest-mock": "^30.0.0-alpha.1",
     "jest-snapshot": "^30.0.0-alpha.1",
-    "piscina": "^3.1.0",
-    "supports-color": "^9.2.1"
+    "supports-color": "^9.2.1",
+    "tinypool": "^0.8.1"
   },
   "devDependencies": {
     "prettier": "^2.6.2"

src/index.js

@@ -1,4 +1,4 @@
-import { Piscina } from "piscina";
+import Tinypool from "tinypool";
 import supportsColor from "supports-color";
 import { MessageChannel } from "worker_threads";
 
@@ -7,7 +7,7 @@ import { MessageChannel } from "worker_threads";
 export default class LightRunner {
   // TODO: Use real private fields when we drop support for Node.js v12
   _config;
-  _piscina;
+  _pool;
 
   constructor(config) {
     this._config = config;
@@ -24,7 +24,7 @@ export default class LightRunner {
     const { maxWorkers } = config;
     const runInBand = maxWorkers === 1;
 
-    this._piscina = new (runInBand ? InBandPiscina : Piscina)({
+    this._pool = new (runInBand ? InBandTinypool : Tinypool)({
       filename: new URL("./worker-runner.js", import.meta.url).href,
       maxThreads: maxWorkers,
       env: {
@@ -52,7 +52,7 @@ export default class LightRunner {
         mc.port2.onmessage = () => onStart(test);
         mc.port2.unref();
 
-        return this._piscina
+        return this._pool
           .run(
             { test, updateSnapshot, testNamePattern, port: mc.port1 },
             { transferList: [mc.port1] }
@@ -66,9 +66,9 @@ export default class LightRunner {
   }
 }
 
-// Exposes an API similar to Piscina, but it uses dynamic import()
+// Exposes an API similar to Tinypool, but it uses dynamic import()
 // rather than worker_threads.
-class InBandPiscina {
+class InBandTinypool {
   _moduleP;
   _moduleDefault;
 

src/worker-runner.js

@@ -4,7 +4,7 @@ import { performance } from "perf_hooks";
 import * as snapshot from "jest-snapshot";
 import { jestExpect as expect } from "@jest/expect";
 import * as circus from "jest-circus";
-import { isWorkerThread } from "piscina";
+import Tinypool from "tinypool";
 
 /** @typedef {{ failures: number, passes: number, pending: number, start: number, end: number }} Stats */
 /** @typedef {{ ancestors: string[], title: string, duration: number, errors: Error[], skipped: boolean }} InternalTestResult */
@@ -14,7 +14,7 @@ const initialSetup = once(async projectConfig => {
   // process.chdir, that we use multiple times in our tests.
   // We can "polyfill" it for process.cwd() usage, but it
   // won't affect path.* and fs.* functions.
-  if (isWorkerThread) {
+  if (Tinypool.isWorkerThread) {
     const startCwd = process.cwd();
     let cwd = startCwd;
     process.cwd = () => cwd;

yarn.lock

@@ -14,13 +14,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@assemblyscript/loader@npm:^0.10.1":
-  version: 0.10.1
-  resolution: "@assemblyscript/loader@npm:0.10.1"
-  checksum: 62f3a070052f578c28bdb860b046c6a079f03755fd5b1c97cc4dd17869c1f292fd50cbafc5fb804073d71ba6b6a50b8bce976724d8a0ce402ffe8957e9a5b9ec
-  languageName: node
-  linkType: hard
-
 "@babel/code-frame@npm:^7.12.13, @babel/code-frame@npm:^7.16.7":
   version: 7.16.7
   resolution: "@babel/code-frame@npm:7.16.7"
@@ -887,13 +880,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"base64-js@npm:^1.2.0":
-  version: 1.5.1
-  resolution: "base64-js@npm:1.5.1"
-  checksum: 669632eb3745404c2f822a18fc3a0122d2f9a7a13f7fb8b5823ee19d1d2ff9ee5b52c53367176ea4ad093c332fd5ab4bd0ebae5a8e27917a4105a4cfc86b1005
-  languageName: node
-  linkType: hard
-
 "big-integer@npm:^1.6.44":
   version: 1.6.51
   resolution: "big-integer@npm:1.6.51"
@@ -1303,13 +1289,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eventemitter-asyncresource@npm:^1.0.0":
-  version: 1.0.0
-  resolution: "eventemitter-asyncresource@npm:1.0.0"
-  checksum: 3cfbbc3490bd429a165bff6336289ff810f7df214796f25000d2097a5a0883eae51542a78674916ff99bbd4c66811911b310df1cb4fc96dfc9546ba9dfc89f8f
-  languageName: node
-  linkType: hard
-
 "execa@npm:^5.0.0":
   version: 5.1.1
   resolution: "execa@npm:5.1.1"
@@ -1560,24 +1539,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"hdr-histogram-js@npm:^2.0.1":
-  version: 2.0.3
-  resolution: "hdr-histogram-js@npm:2.0.3"
-  dependencies:
-    "@assemblyscript/loader": "npm:^0.10.1"
-    base64-js: "npm:^1.2.0"
-    pako: "npm:^1.0.3"
-  checksum: c88970b2df733daad3eb30adfbe44517dc03bb816c49ed3e85d03dc40df38a0a25109a20d0620baf968048ae57720dac3958c35081a056f264f33c22368690d3
-  languageName: node
-  linkType: hard
-
-"hdr-histogram-percentiles-obj@npm:^3.0.0":
-  version: 3.0.0
-  resolution: "hdr-histogram-percentiles-obj@npm:3.0.0"
-  checksum: 8fb15ab608997faf7716b641c032c538320f2479aee99af89d40aa5b9215f15b879d096e32745b552f7c50081acced7182bf58133d53dc61230aede5ac255d53
-  languageName: node
-  linkType: hard
-
 "http-cache-semantics@npm:^4.1.0":
   version: 4.1.0
   resolution: "http-cache-semantics@npm:4.1.0"
@@ -1907,9 +1868,9 @@ __metadata:
     jest-each: "npm:^30.0.0-alpha.1"
     jest-mock: "npm:^30.0.0-alpha.1"
     jest-snapshot: "npm:^30.0.0-alpha.1"
-    piscina: "npm:^3.1.0"
     prettier: "npm:^2.6.2"
     supports-color: "npm:^9.2.1"
+    tinypool: "npm:^0.8.1"
   peerDependencies:
     jest: ^27.5.0 || ^28.0.0 || ^29.0.0|| ^30.0.0-0
   languageName: unknown
@@ -2346,37 +2307,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nice-napi@npm:^1.0.2":
-  version: 1.0.2
-  resolution: "nice-napi@npm:1.0.2"
-  dependencies:
-    node-addon-api: "npm:^3.0.0"
-    node-gyp: "npm:latest"
-    node-gyp-build: "npm:^4.2.2"
-  conditions: "!os=win32"
-  languageName: node
-  linkType: hard
-
-"node-addon-api@npm:^3.0.0":
-  version: 3.2.1
-  resolution: "node-addon-api@npm:3.2.1"
-  dependencies:
-    node-gyp: "npm:latest"
-  checksum: 681b52dfa3e15b0a8e5cf283cc0d8cd5fd2a57c559ae670fcfd20544cbb32f75de7648674110defcd17ab2c76ebef630aa7d2d2f930bc7a8cc439b20fe233518
-  languageName: node
-  linkType: hard
-
-"node-gyp-build@npm:^4.2.2":
-  version: 4.3.0
-  resolution: "node-gyp-build@npm:4.3.0"
-  bin:
-    node-gyp-build: bin.js
-    node-gyp-build-optional: optional.js
-    node-gyp-build-test: build-test.js
-  checksum: 673bd8f12694cc226747333fc181a7288e32dc96e88067bccb9ae3969ed1459fe461f85ad76d0ec8566ec1ae75c179e7a6667b0094cc78c9431ecfc95b5c24aa
-  languageName: node
-  linkType: hard
-
 "node-gyp@npm:latest":
   version: 9.0.0
   resolution: "node-gyp@npm:9.0.0"
@@ -2541,13 +2471,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pako@npm:^1.0.3":
-  version: 1.0.11
-  resolution: "pako@npm:1.0.11"
-  checksum: 1ad07210e894472685564c4d39a08717e84c2a68a70d3c1d9e657d32394ef1670e22972a433cbfe48976cb98b154ba06855dcd3fcfba77f60f1777634bec48c0
-  languageName: node
-  linkType: hard
-
 "path-exists@npm:^4.0.0":
   version: 4.0.0
   resolution: "path-exists@npm:4.0.0"
@@ -2604,21 +2527,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"piscina@npm:^3.1.0":
-  version: 3.2.0
-  resolution: "piscina@npm:3.2.0"
-  dependencies:
-    eventemitter-asyncresource: "npm:^1.0.0"
-    hdr-histogram-js: "npm:^2.0.1"
-    hdr-histogram-percentiles-obj: "npm:^3.0.0"
-    nice-napi: "npm:^1.0.2"
-  dependenciesMeta:
-    nice-napi:
-      optional: true
-  checksum: 46838c513c2f6bef2c838d25a0b4da7760805a111dc70333aecfa30165c4eb693989d6f481150819c1377f029a22d70df4066c8d071d832745dc00458386dfce
-  languageName: node
-  linkType: hard
-
 "prettier@npm:^2.6.2":
   version: 2.6.2
   resolution: "prettier@npm:2.6.2"
@@ -3035,6 +2943,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"tinypool@npm:^0.8.1":
+  version: 0.8.1
+  resolution: "tinypool@npm:0.8.1"
+  checksum: 3fae8acc22b7d0364eb202b64f61f0d8b10dcead6bef9b8fab1836857dcecd0e34fadc47ab309754ead2cb29bfa4b3467a9fc0daae23669b19ff403ae1364b5c
+  languageName: node
+  linkType: hard
+
 "titleize@npm:^3.0.0":
   version: 3.0.0
   resolution: "titleize@npm:3.0.0"