diff --git a/packages/@lwc/perf-benchmarks/README.md b/packages/@lwc/perf-benchmarks/README.md
index 9381e107f6..9e19674a5f 100644
--- a/packages/@lwc/perf-benchmarks/README.md
+++ b/packages/@lwc/perf-benchmarks/README.md
@@ -56,10 +56,13 @@ You can also use these environment variables to adjust the default benchmark set
 BENCHMARK_SAMPLE_SIZE=50
 BENCHMARK_AUTO_SAMPLE_CONDITIONS=25%
 BENCHMARK_TIMEOUT=5
+BENCHMARK_CPU_THROTTLING_RATE=4
 ```
 
 See the [Tachometer documentation](https://github.com/Polymer/tachometer) for details on what these mean.
 
+For `BENCHMARK_CPU_THROTTLING_RATE`, some tests have a built-in `cpuThrottlingRate` which is exported as a `const`. The environment variable will override this.
+
 You can run a smoke test (to confirm the benchmark tests are working) using:
 
 ```shell
diff --git a/packages/@lwc/perf-benchmarks/package.json b/packages/@lwc/perf-benchmarks/package.json
index 23777dd897..90c143cdab 100644
--- a/packages/@lwc/perf-benchmarks/package.json
+++ b/packages/@lwc/perf-benchmarks/package.json
@@ -55,6 +55,9 @@
                     },
                     {
                         "env": "BENCHMARK_SMOKE_TEST"
+                    },
+                    {
+                        "env": "BENCHMARK_CPU_THROTTLING_RATE"
                     }
                 ]
             },
diff --git a/packages/@lwc/perf-benchmarks/scripts/build.js b/packages/@lwc/perf-benchmarks/scripts/build.js
index 78d5305f38..63beeaa7fc 100644
--- a/packages/@lwc/perf-benchmarks/scripts/build.js
+++ b/packages/@lwc/perf-benchmarks/scripts/build.js
@@ -9,14 +9,11 @@
  * Builds the HTML and tachometer.json files necessary to run the benchmarks.
  */
 
-const path = require('path');
-const fs = require('fs');
-const { promisify } = require('util');
+const path = require('node:path');
+const { readFile, writeFile } = require('node:fs/promises');
 const { glob } = require('glob');
 const { hashElement } = require('folder-hash');
 
-const writeFile = promisify(fs.writeFile);
-
 const {
     BENCHMARK_SMOKE_TEST,
     BENCHMARK_REPO = 'https://github.com/salesforce/lwc.git',
@@ -27,6 +24,7 @@ const {
 let {
     BENCHMARK_SAMPLE_SIZE = 100, // minimum number of samples to run
     BENCHMARK_TIMEOUT = 15, // timeout in minutes during auto-sampling (after the minimum samples). If 0, no auto-sampling
+    BENCHMARK_CPU_THROTTLING_RATE, // CPU throttling factor, typically 2 or 4
 } = process.env;
 
 const toInt = (num) => (typeof num === 'number' ? num : parseInt(num, 10));
@@ -35,6 +33,8 @@ const toInt = (num) => (typeof num === 'number' ? num : parseInt(num, 10));
 BENCHMARK_SAMPLE_SIZE = BENCHMARK_SMOKE_TEST ? 2 : toInt(BENCHMARK_SAMPLE_SIZE);
 // Timeout of 0 means don't auto-sample at all
 BENCHMARK_TIMEOUT = BENCHMARK_SMOKE_TEST ? 0 : toInt(BENCHMARK_TIMEOUT);
+BENCHMARK_CPU_THROTTLING_RATE =
+    BENCHMARK_CPU_THROTTLING_RATE && toInt(BENCHMARK_CPU_THROTTLING_RATE);
 
 const benchmarkComponentsDir = path.join(__dirname, '../../../@lwc/perf-benchmarks-components');
 
@@ -66,7 +66,7 @@ function createHtml(benchmarkFile) {
   `.trim();
 }
 
-function createTachometerJson(htmlFilename, benchmarkName, directoryHash) {
+function createTachometerJson(htmlFilename, benchmarkName, directoryHash, cpuThrottlingRate) {
     return {
         $schema: 'https://raw.githubusercontent.com/Polymer/tachometer/master/config.schema.json',
         sampleSize: BENCHMARK_SAMPLE_SIZE,
@@ -80,6 +80,7 @@ function createTachometerJson(htmlFilename, benchmarkName, directoryHash) {
                     name: 'chrome',
                     headless: true,
                     ...(CHROME_BINARY && { binary: CHROME_BINARY }),
+                    ...(typeof cpuThrottlingRate === 'number' && { cpuThrottlingRate }),
                 },
                 measurement: {
                     mode: 'performance',
@@ -126,6 +127,16 @@ function createTachometerJson(htmlFilename, benchmarkName, directoryHash) {
     };
 }
 
+// Given a *.benchmark.js file, extract the exported `cpuThrottlingRate`.
+async function extractCpuThrottlingRate(benchmarkFile) {
+    const contents = await readFile(benchmarkFile, 'utf-8');
+    // Rollup transforms this into `const cpuThrottlingRate = 2; [...] export { cpuThrottlingRate };`,
+    // so we just look for the const, not the export.
+    // We could do a more sophisticated thing than a regex, but the regex works fine.
+    const match = contents.match(/const cpuThrottlingRate\s*=\s*(\d+)/);
+    return match && parseInt(match[1], 10);
+}
+
 // Given a benchmark source file, create the necessary HTML file and Tachometer JSON
 // file for running it.
 async function processBenchmarkFile(benchmarkFile, directoryHash) {
@@ -141,7 +152,16 @@ async function processBenchmarkFile(benchmarkFile, directoryHash) {
     async function writeTachometerJsonFile() {
         const engineType = benchmarkFile.includes('/engine-server/') ? 'server' : 'dom';
         const benchmarkName = `${engineType}-${benchmarkFileBasename.split('.')[0]}`;
-        const tachometerJson = createTachometerJson(htmlFilename, benchmarkName, directoryHash);
+        const cpuThrottlingRate =
+            typeof BENCHMARK_CPU_THROTTLING_RATE === 'number'
+                ? BENCHMARK_CPU_THROTTLING_RATE
+                : await extractCpuThrottlingRate(benchmarkFile);
+        const tachometerJson = createTachometerJson(
+            htmlFilename,
+            benchmarkName,
+            directoryHash,
+            cpuThrottlingRate
+        );
         const jsonFilename = path.join(
             targetDir,
             `${benchmarkFileBasename.split('.')[0]}.tachometer.json`
diff --git a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/benchmark-expression/expression.benchmark.js b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/benchmark-expression/expression.benchmark.js
index aecdcb2ec7..c58ad75db5 100644
--- a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/benchmark-expression/expression.benchmark.js
+++ b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/benchmark-expression/expression.benchmark.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, salesforce.com, inc.
+ * Copyright (c) 2024, Salesforce, Inc.
  * All rights reserved.
  * SPDX-License-Identifier: MIT
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
@@ -11,6 +11,9 @@ import Expression from '@lwc/perf-benchmarks-components/dist/dom/benchmark/expre
 import Store from '@lwc/perf-benchmarks-components/dist/dom/benchmark/store/store.js';
 import { insertComponent, destroyComponent } from '../../../utils/utils.js';
 
+// Throttling because otherwise this benchmark completes in <~5ms on a MacBook Pro
+export const cpuThrottlingRate = 4;
+
 benchmark(`dom/expressions`, () => {
     let expressionElement;
 
diff --git a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/clear-rows-1k.benchmark.js b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/clear-rows-1k.benchmark.js
index 4218214c31..d53596660a 100644
--- a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/clear-rows-1k.benchmark.js
+++ b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/clear-rows-1k.benchmark.js
@@ -6,6 +6,9 @@
  */
 import { runJsFrameworkBenchmark, WARMUP_COUNT } from '../../../utils/runJsFrameworkBenchmark.js';
 
+// Throttling per https://krausest.github.io/js-framework-benchmark/2024/table_chrome_122.0.6261.69.html
+export const cpuThrottlingRate = 4;
+
 // Based on https://github.com/krausest/js-framework-benchmark/blob/6c9f43f/webdriver-ts/src/benchmarksPuppeteer.ts
 // See `benchClear()`
 runJsFrameworkBenchmark(
diff --git a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/partial-update-1k.benchmark.js b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/partial-update-1k.benchmark.js
index 8dc8e42b86..ec846f36a1 100644
--- a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/partial-update-1k.benchmark.js
+++ b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/partial-update-1k.benchmark.js
@@ -6,6 +6,9 @@
  */
 import { runJsFrameworkBenchmark, WARMUP_COUNT } from '../../../utils/runJsFrameworkBenchmark.js';
 
+// Throttling per https://krausest.github.io/js-framework-benchmark/2024/table_chrome_122.0.6261.69.html
+export const cpuThrottlingRate = 4;
+
 // Based on https://github.com/krausest/js-framework-benchmark/blob/6c9f43f/webdriver-ts/src/benchmarksPuppeteer.ts
 // See `benchUpdate()`
 runJsFrameworkBenchmark(
diff --git a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/remove-row-1k.benchmark.js b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/remove-row-1k.benchmark.js
index 17ded3df44..bfd71ead42 100644
--- a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/remove-row-1k.benchmark.js
+++ b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/remove-row-1k.benchmark.js
@@ -6,6 +6,9 @@
  */
 import { runJsFrameworkBenchmark, WARMUP_COUNT } from '../../../utils/runJsFrameworkBenchmark.js';
 
+// Throttling per https://krausest.github.io/js-framework-benchmark/2024/table_chrome_122.0.6261.69.html
+export const cpuThrottlingRate = 2;
+
 const rowsToSkip = 4;
 
 // Based on https://github.com/krausest/js-framework-benchmark/blob/6c9f43f/webdriver-ts/src/benchmarksPuppeteer.ts
diff --git a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/select-row-1k.benchmark.js b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/select-row-1k.benchmark.js
index d502293763..ce3a548c61 100644
--- a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/select-row-1k.benchmark.js
+++ b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/select-row-1k.benchmark.js
@@ -6,6 +6,9 @@
  */
 import { runJsFrameworkBenchmark, WARMUP_COUNT } from '../../../utils/runJsFrameworkBenchmark.js';
 
+// Throttling per https://krausest.github.io/js-framework-benchmark/2024/table_chrome_122.0.6261.69.html
+export const cpuThrottlingRate = 4;
+
 // Based on https://github.com/krausest/js-framework-benchmark/blob/6c9f43f/webdriver-ts/src/benchmarksPuppeteer.ts
 // See `benchSelect()`
 runJsFrameworkBenchmark(
diff --git a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/swap-rows-1k.benchmark.js b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/swap-rows-1k.benchmark.js
index 05397b07dd..0b05af2cf8 100644
--- a/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/swap-rows-1k.benchmark.js
+++ b/packages/@lwc/perf-benchmarks/src/__benchmarks__/engine-dom/js-framework-benchmark/swap-rows-1k.benchmark.js
@@ -6,6 +6,9 @@
  */
 import { runJsFrameworkBenchmark, WARMUP_COUNT } from '../../../utils/runJsFrameworkBenchmark.js';
 
+// Throttling per https://krausest.github.io/js-framework-benchmark/2024/table_chrome_122.0.6261.69.html
+export const cpuThrottlingRate = 4;
+
 // Based on https://github.com/krausest/js-framework-benchmark/blob/6c9f43f/webdriver-ts/src/benchmarksPuppeteer.ts
 // See `benchSwapRows()`
 runJsFrameworkBenchmark(