tests: use custom benchmarking solution instead of outdated jest-bench package (#4468)

* Remove jest-bench dependency and use custom solutions * review * Update tests/bench/calculateRank.bench.js Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Alexandr <qwerty541zxc@gmail.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
2025-10-01 22:20:32 +03:00
parent 651de3afe4
commit 0d60641b7c
8 changed files with 157 additions and 303 deletions
@@ -1,16 +1,13 @@
 export default {
-  // Jest-bench need its own test environment to function
-  testEnvironment: "jest-bench/environment",
-  testEnvironmentOptions: {
-    // still Jest-bench environment will run your environment if you specify it here
-    testEnvironment: "jest-environment-node",
-    testEnvironmentOptions: {
-      // specify any option for your environment
-    },
-  },
-  // always include "default" reporter along with Jest-bench reporter
-  // for error reporting
-  reporters: ["default", "jest-bench/reporter"],
-  // will pick up "*.bench.js" file.
+  clearMocks: true,
+  transform: {},
+  testEnvironment: "jsdom",
+  coverageProvider: "v8",
+  testPathIgnorePatterns: ["<rootDir>/node_modules/", "<rootDir>/tests/e2e/"],
+  modulePathIgnorePatterns: ["<rootDir>/node_modules/", "<rootDir>/tests/e2e/"],
+  coveragePathIgnorePatterns: [
+    "<rootDir>/node_modules/",
+    "<rootDir>/tests/e2e/",
+  ],
  testRegex: "(\\.bench)\\.(ts|tsx|js)$",
 };
@@ -33,7 +33,6 @@
        "hjson": "^3.2.2",
        "husky": "^9.1.7",
        "jest": "^29.7.0",
-        "jest-bench": "^29.7.1",
        "jest-environment-jsdom": "^30.1.2",
        "js-yaml": "^4.1.0",
        "lint-staged": "^16.2.0",
@@ -2349,16 +2348,6 @@
      "dev": true,
      "license": "Apache-2.0"
    },
-    "node_modules/benchmark": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/benchmark/-/benchmark-2.1.4.tgz",
-      "integrity": "sha512-l9MlfN4M1K/H2fbhfMy3B7vJd6AGKJVQn2h6Sg/Yx+KckoUA7ewS5Vv6TjSq18ooE1kS9hhAlQRH3AkXIh/aOQ==",
-      "dev": true,
-      "dependencies": {
-        "lodash": "^4.17.4",
-        "platform": "^1.3.3"
-      }
-    },
    "node_modules/brace-expansion": {
      "version": "1.1.11",
      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -3165,18 +3154,6 @@
        "url": "https://opencollective.com/eslint"
      }
    },
-    "node_modules/eslint/node_modules/@eslint/js": {
-      "version": "9.35.0",
-      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.35.0.tgz",
-      "integrity": "sha512-30iXE9whjlILfWobBkNerJo+TXYsgVM5ERQwMcMKCHckHflCmf7wXDAHlARoWnh0s1U72WqlbeyE7iAcCzuCPw==",
-      "dev": true,
-      "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
-      },
-      "funding": {
-        "url": "https://eslint.org/donate"
-      }
-    },
    "node_modules/eslint/node_modules/escape-string-regexp": {
      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-4.0.0.tgz",
@@ -4176,23 +4153,6 @@
        }
      }
    },
-    "node_modules/jest-bench": {
-      "version": "29.7.1",
-      "resolved": "https://registry.npmjs.org/jest-bench/-/jest-bench-29.7.1.tgz",
-      "integrity": "sha512-eFjQa+KVThwqY+Ecs9jeD+CdTUlDrJUAAFLy+DlWW5H1crnG1F4ad5Dk8K+kV6nB2aGCdFcusKBdgtx1SXYiHQ==",
-      "dev": true,
-      "dependencies": {
-        "@jest/globals": "^29.7.0",
-        "@jest/reporters": "^29.7.0",
-        "benchmark": "^2.1.4",
-        "chalk": "^4.1.0",
-        "lodash": "^4.17.20",
-        "ndjson": "^2.0.0"
-      },
-      "peerDependencies": {
-        "jest": "^29.7.0"
-      }
-    },
    "node_modules/jest-changed-files": {
      "version": "29.7.0",
      "resolved": "https://registry.npmjs.org/jest-changed-files/-/jest-changed-files-29.7.0.tgz",
@@ -5356,12 +5316,6 @@
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      "dev": true
    },
-    "node_modules/json-stringify-safe": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
-      "integrity": "sha512-ZClg6AaYvamvYEE82d3Iyd3vSSIjQ+odgjaTzRuO3s7toCdFKczob2i0zCh7JE8kWn17yvAWhUVxvqGwUalsRA==",
-      "dev": true
-    },
    "node_modules/json5": {
      "version": "2.2.3",
      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
@@ -5539,12 +5493,6 @@
        "node": ">=8"
      }
    },
-    "node_modules/lodash": {
-      "version": "4.17.21",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
-      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
-      "dev": true
-    },
    "node_modules/lodash.merge": {
      "version": "4.6.2",
      "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
@@ -5833,15 +5781,6 @@
        "node": "*"
      }
    },
-    "node_modules/minimist": {
-      "version": "1.2.8",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
-      "integrity": "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==",
-      "dev": true,
-      "funding": {
-        "url": "https://github.com/sponsors/ljharb"
-      }
-    },
    "node_modules/ms": {
      "version": "2.1.3",
      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -5866,25 +5805,6 @@
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      "dev": true
    },
-    "node_modules/ndjson": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ndjson/-/ndjson-2.0.0.tgz",
-      "integrity": "sha512-nGl7LRGrzugTtaFcJMhLbpzJM6XdivmbkdlaGcrk/LXg2KL/YBC6z1g70xh0/al+oFuVFP8N8kiWRucmeEH/qQ==",
-      "dev": true,
-      "dependencies": {
-        "json-stringify-safe": "^5.0.1",
-        "minimist": "^1.2.5",
-        "readable-stream": "^3.6.0",
-        "split2": "^3.0.0",
-        "through2": "^4.0.0"
-      },
-      "bin": {
-        "ndjson": "cli.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
    "node_modules/node-int64": {
      "version": "0.4.0",
      "resolved": "https://registry.npmjs.org/node-int64/-/node-int64-0.4.0.tgz",
@@ -6169,12 +6089,6 @@
        "node": ">=8"
      }
    },
-    "node_modules/platform": {
-      "version": "1.3.6",
-      "resolved": "https://registry.npmjs.org/platform/-/platform-1.3.6.tgz",
-      "integrity": "sha512-fnWVljUchTro6RiCFvCXBbNhJc2NijN7oIQxbwsyL0buWJPG85v81ehlHI9fXrJsMNgTofEoWIQeClKpgxFLrg==",
-      "dev": true
-    },
    "node_modules/prettier": {
      "version": "3.6.2",
      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.6.2.tgz",
@@ -6265,20 +6179,6 @@
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      "dev": true
    },
-    "node_modules/readable-stream": {
-      "version": "3.6.2",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
-      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
-      "dev": true,
-      "dependencies": {
-        "inherits": "^2.0.3",
-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
    "node_modules/redent": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/redent/-/redent-3.0.0.tgz",
@@ -6409,26 +6309,6 @@
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      "dev": true
    },
-    "node_modules/safe-buffer": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
-      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
-        {
-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
-        {
-          "type": "consulting",
-          "url": "https://feross.org/support"
-        }
-      ]
-    },
    "node_modules/safer-buffer": {
      "version": "2.1.2",
      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
@@ -6582,15 +6462,6 @@
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      "dev": true
    },
-    "node_modules/split2": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/split2/-/split2-3.2.2.tgz",
-      "integrity": "sha512-9NThjpgZnifTkJpzTZ7Eue85S49QwpNhZTq6GRJwObb6jnLFNGB7Qm73V5HewTROPyxD0C29xqmaI68bQtV+hg==",
-      "dev": true,
-      "dependencies": {
-        "readable-stream": "^3.0.0"
-      }
-    },
    "node_modules/sprintf-js": {
      "version": "1.0.3",
      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -6609,15 +6480,6 @@
        "node": ">=10"
      }
    },
-    "node_modules/string_decoder": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
-      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
-      "dev": true,
-      "dependencies": {
-        "safe-buffer": "~5.2.0"
-      }
-    },
    "node_modules/string-argv": {
      "version": "0.3.2",
      "resolved": "https://registry.npmjs.org/string-argv/-/string-argv-0.3.2.tgz",
@@ -6752,15 +6614,6 @@
        "node": ">=8"
      }
    },
-    "node_modules/through2": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/through2/-/through2-4.0.2.tgz",
-      "integrity": "sha512-iOqSav00cVxEEICeD7TjLB1sueEL+81Wpzp2bY17uZjZN0pWZPuo4suZ/61VujxmqSGFfgOcNuTZ85QJwNZQpw==",
-      "dev": true,
-      "dependencies": {
-        "readable-stream": "3"
-      }
-    },
    "node_modules/tldts": {
      "version": "6.1.86",
      "resolved": "https://registry.npmjs.org/tldts/-/tldts-6.1.86.tgz",
@@ -6924,12 +6777,6 @@
        "punycode": "^2.1.0"
      }
    },
-    "node_modules/util-deprecate": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
-      "dev": true
-    },
    "node_modules/v8-to-istanbul": {
      "version": "9.1.0",
      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-9.1.0.tgz",
@@ -8927,16 +8774,6 @@
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      "dev": true
    },
-    "benchmark": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/benchmark/-/benchmark-2.1.4.tgz",
-      "integrity": "sha512-l9MlfN4M1K/H2fbhfMy3B7vJd6AGKJVQn2h6Sg/Yx+KckoUA7ewS5Vv6TjSq18ooE1kS9hhAlQRH3AkXIh/aOQ==",
-      "dev": true,
-      "requires": {
-        "lodash": "^4.17.4",
-        "platform": "^1.3.3"
-      }
-    },
    "brace-expansion": {
      "version": "1.1.11",
      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -9430,12 +9267,6 @@
        "optionator": "^0.9.3"
      },
      "dependencies": {
-        "@eslint/js": {
-          "version": "9.35.0",
-          "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.35.0.tgz",
-          "integrity": "sha512-30iXE9whjlILfWobBkNerJo+TXYsgVM5ERQwMcMKCHckHflCmf7wXDAHlARoWnh0s1U72WqlbeyE7iAcCzuCPw==",
-          "dev": true
-        },
        "escape-string-regexp": {
          "version": "4.0.0",
          "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-4.0.0.tgz",
@@ -10172,20 +10003,6 @@
        "jest-cli": "^29.7.0"
      }
    },
-    "jest-bench": {
-      "version": "29.7.1",
-      "resolved": "https://registry.npmjs.org/jest-bench/-/jest-bench-29.7.1.tgz",
-      "integrity": "sha512-eFjQa+KVThwqY+Ecs9jeD+CdTUlDrJUAAFLy+DlWW5H1crnG1F4ad5Dk8K+kV6nB2aGCdFcusKBdgtx1SXYiHQ==",
-      "dev": true,
-      "requires": {
-        "@jest/globals": "^29.7.0",
-        "@jest/reporters": "^29.7.0",
-        "benchmark": "^2.1.4",
-        "chalk": "^4.1.0",
-        "lodash": "^4.17.20",
-        "ndjson": "^2.0.0"
-      }
-    },
    "jest-changed-files": {
      "version": "29.7.0",
      "resolved": "https://registry.npmjs.org/jest-changed-files/-/jest-changed-files-29.7.0.tgz",
@@ -11083,12 +10900,6 @@
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      "dev": true
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-    "json-stringify-safe": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
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-      "dev": true
-    },
    "json5": {
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      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
@@ -11211,12 +11022,6 @@
        "p-locate": "^4.1.0"
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-    "lodash": {
-      "version": "4.17.21",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
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-      "dev": true
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      "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
@@ -11422,12 +11227,6 @@
        "brace-expansion": "^1.1.7"
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-    "minimist": {
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-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
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-      "dev": true,
-      "requires": {
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-        "minimist": "^1.2.5",
-        "readable-stream": "^3.6.0",
-        "split2": "^3.0.0",
-        "through2": "^4.0.0"
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@@ -11670,12 +11456,6 @@
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-      "dev": true
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      "dev": true
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-      "dev": true,
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-        "inherits": "^2.0.3",
-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
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-      "dev": true
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      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
@@ -11963,15 +11726,6 @@
      "integrity": "sha512-xxRs31BqRYHwiMzudOrpSiHtZ8i/GeionCBDSilhYRj+9gIcI8wCZTlXZKu9vZIVqViP3dcp9qE5G6AlIaD+TQ==",
      "dev": true
    },
-    "split2": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/split2/-/split2-3.2.2.tgz",
-      "integrity": "sha512-9NThjpgZnifTkJpzTZ7Eue85S49QwpNhZTq6GRJwObb6jnLFNGB7Qm73V5HewTROPyxD0C29xqmaI68bQtV+hg==",
-      "dev": true,
-      "requires": {
-        "readable-stream": "^3.0.0"
-      }
-    },
    "sprintf-js": {
      "version": "1.0.3",
      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -11987,15 +11741,6 @@
        "escape-string-regexp": "^2.0.0"
      }
    },
-    "string_decoder": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
-      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "~5.2.0"
-      }
-    },
    "string-argv": {
      "version": "0.3.2",
      "resolved": "https://registry.npmjs.org/string-argv/-/string-argv-0.3.2.tgz",
@@ -12091,15 +11836,6 @@
        "minimatch": "^3.0.4"
      }
    },
-    "through2": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/through2/-/through2-4.0.2.tgz",
-      "integrity": "sha512-iOqSav00cVxEEICeD7TjLB1sueEL+81Wpzp2bY17uZjZN0pWZPuo4suZ/61VujxmqSGFfgOcNuTZ85QJwNZQpw==",
-      "dev": true,
-      "requires": {
-        "readable-stream": "3"
-      }
-    },
    "tldts": {
      "version": "6.1.86",
      "resolved": "https://registry.npmjs.org/tldts/-/tldts-6.1.86.tgz",
@@ -12211,12 +11947,6 @@
        "punycode": "^2.1.0"
      }
    },
-    "util-deprecate": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
-      "dev": true
-    },
    "v8-to-istanbul": {
      "version": "9.1.0",
      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-9.1.0.tgz",
@@ -52,7 +52,6 @@
    "hjson": "^3.2.2",
    "husky": "^9.1.7",
    "jest": "^29.7.0",
-    "jest-bench": "^29.7.1",
    "jest-environment-jsdom": "^30.1.2",
    "js-yaml": "^4.1.0",
    "lint-staged": "^16.2.0",
@@ -1,8 +1,8 @@
-import { benchmarkSuite } from "jest-bench";
 import api from "../../api/index.js";
 import axios from "axios";
 import MockAdapter from "axios-mock-adapter";
-import { jest } from "@jest/globals";
+import { it, jest } from "@jest/globals";
+import { runAndLogStats } from "./utils.js";

 const stats = {
  name: "Anurag Hazra",
@@ -69,10 +69,10 @@ const faker = (query, data) => {
  return { req, res };
 };

-benchmarkSuite("test /api", {
-  ["simple request"]: async () => {
+it("test /api", async () => {
+  await runAndLogStats("test /api", async () => {
    const { req, res } = faker({}, data_stats);

    await api(req, res);
-  },
+  });
 });
@@ -1,8 +1,9 @@
-import { benchmarkSuite } from "jest-bench";
 import { calculateRank } from "../../src/calculateRank.js";
+import { it } from "@jest/globals";
+import { runAndLogStats } from "./utils.js";

-benchmarkSuite("calculateRank", {
-  ["calculateRank"]: () => {
+it("calculateRank", async () => {
+  await runAndLogStats("calculateRank", () => {
    calculateRank({
      all_commits: false,
      commits: 1300,
@@ -13,5 +14,5 @@ benchmarkSuite("calculateRank", {
      stars: 600000,
      followers: 50000,
    });
-  },
+  });
 });
@@ -1,8 +1,8 @@
-import { benchmarkSuite } from "jest-bench";
 import gist from "../../api/gist.js";
 import axios from "axios";
 import MockAdapter from "axios-mock-adapter";
-import { jest } from "@jest/globals";
+import { it, jest } from "@jest/globals";
+import { runAndLogStats } from "./utils.js";

 const gist_data = {
  data: {
@@ -34,8 +34,8 @@ const gist_data = {
 const mock = new MockAdapter(axios);
 mock.onPost("https://api.github.com/graphql").reply(200, gist_data);

-benchmarkSuite("test /api/gist", {
-  ["simple request"]: async () => {
+it("test /api/gist", async () => {
+  await runAndLogStats("test /api/gist", async () => {
    const req = {
      query: {
        id: "bbfce31e0217a3689c8d961a356cb10d",
@@ -47,5 +47,5 @@ benchmarkSuite("test /api/gist", {
    };

    await gist(req, res);
-  },
+  });
 });
@@ -1,8 +1,8 @@
-import { benchmarkSuite } from "jest-bench";
 import pin from "../../api/pin.js";
 import axios from "axios";
 import MockAdapter from "axios-mock-adapter";
-import { jest } from "@jest/globals";
+import { it, jest } from "@jest/globals";
+import { runAndLogStats } from "./utils.js";

 const data_repo = {
  repository: {
@@ -32,8 +32,8 @@ const data_user = {
 const mock = new MockAdapter(axios);
 mock.onPost("https://api.github.com/graphql").reply(200, data_user);

-benchmarkSuite("test /api/pin", {
-  ["simple request"]: async () => {
+it("test /api/pin", async () => {
+  await runAndLogStats("test /api/pin", async () => {
    const req = {
      query: {
        username: "anuraghazra",
@@ -46,5 +46,5 @@ benchmarkSuite("test /api/pin", {
    };

    await pin(req, res);
-  },
+  });
 });
@@ -0,0 +1,127 @@
+const DEFAULT_RUNS = 1000;
+const DEFAULT_WARMUPS = 50;
+
+/**
+ * Formats a duration in nanoseconds to a compact human-readable string.
+ * @param {bigint} ns Duration in nanoseconds.
+ * @returns {string} Formatted time string.
+ */
+const formatTime = (ns) => {
+  if (ns < 1_000n) {
+    return `${ns}ns`;
+  }
+  if (ns < 1_000_000n) {
+    return `${Number(ns) / 1_000}µs`;
+  }
+  if (ns < 1_000_000_000n) {
+    return `${(Number(ns) / 1_000_000).toFixed(3)}ms`;
+  }
+  return `${(Number(ns) / 1_000_000_000).toFixed(3)}s`;
+};
+
+/**
+ * Measures synchronous or async function execution time.
+ * @param {Function} fn Function to measure.
+ * @returns {Promise<bigint>} elapsed nanoseconds
+ */
+const measurePerformance = async (fn) => {
+  const start = process.hrtime.bigint();
+  const ret = fn();
+  if (ret instanceof Promise) {
+    await ret;
+  }
+  const end = process.hrtime.bigint();
+  return end - start;
+};
+
+/**
+ * Computes basic & extended statistics.
+ * @param {bigint[]} samples Array of samples in nanoseconds.
+ * @returns {object} Stats
+ */
+const computeStats = (samples) => {
+  const sorted = [...samples].sort((a, b) => (a < b ? -1 : 1));
+  const toNumber = (b) => Number(b); // safe for typical short benches
+  const n = sorted.length;
+  const sum = sorted.reduce((a, b) => a + b, 0n);
+  const avg = Number(sum) / n;
+  const median =
+    n % 2
+      ? toNumber(sorted[(n - 1) / 2])
+      : (toNumber(sorted[n / 2 - 1]) + toNumber(sorted[n / 2])) / 2;
+  const p = (q) => {
+    const idx = Math.min(n - 1, Math.floor((q / 100) * n));
+    return toNumber(sorted[idx]);
+  };
+  const min = toNumber(sorted[0]);
+  const max = toNumber(sorted[n - 1]);
+  const variance =
+    sorted.reduce((acc, v) => acc + (toNumber(v) - avg) ** 2, 0) / n;
+  const stdev = Math.sqrt(variance);
+
+  return {
+    runs: n,
+    min,
+    max,
+    average: avg,
+    median,
+    p75: p(75),
+    p95: p(95),
+    p99: p(99),
+    stdev,
+    totalTime: toNumber(sum),
+  };
+};
+
+/**
+ * Benchmark a function.
+ * @param {string} fnName Name of the function (for logging).
+ * @param {Function} fn Function to benchmark.
+ * @param {object} [opts] Options.
+ * @param {number} [opts.runs] Number of measured runs.
+ * @param {number} [opts.warmup] Warm-up iterations (not measured).
+ * @param {boolean} [opts.trimOutliers] Drop top & bottom 1% before stats.
+ * @returns {Promise<object>} Stats (nanoseconds for core metrics).
+ */
+export const runAndLogStats = async (
+  fnName,
+  fn,
+  { runs = DEFAULT_RUNS, warmup = DEFAULT_WARMUPS, trimOutliers = false } = {},
+) => {
+  if (runs <= 0) {
+    throw new Error("Number of runs must be positive.");
+  }
+
+  // Warm-up
+  for (let i = 0; i < warmup; i++) {
+    const ret = fn();
+    if (ret instanceof Promise) {
+      await ret;
+    }
+  }
+
+  const samples = [];
+  for (let i = 0; i < runs; i++) {
+    samples.push(await measurePerformance(fn));
+  }
+
+  let processed = samples;
+  if (trimOutliers && samples.length > 10) {
+    const sorted = [...samples].sort((a, b) => (a < b ? -1 : 1));
+    const cut = Math.max(1, Math.floor(sorted.length * 0.01));
+    processed = sorted.slice(cut, sorted.length - cut);
+  }
+
+  const stats = computeStats(processed);
+
+  const fmt = (ns) => formatTime(BigInt(Math.round(ns)));
+  console.log(
+    `${fnName} | runs=${stats.runs} avg=${fmt(stats.average)} median=${fmt(
+      stats.median,
+    )} p95=${fmt(stats.p95)} min=${fmt(stats.min)} max=${fmt(
+      stats.max,
+    )} stdev=${fmt(stats.stdev)}`,
+  );
+
+  return stats;
+};