Memory copy speed changed after a browser update

Your memory copy score may look different after updating Chrome, Edge, Firefox, or another browser, even though you have not changed your computer. A lower result can be worrying, but a browser-based benchmark measures more than the RAM itself. Browser version, open tabs, and system activity can all affect the result.

Use the Memory Test (RAM) to compare copy performance under repeatable conditions. These checks can help you tell whether the change is consistent, and whether it points to the browser environment or a wider performance problem.

Compare memory copy performance

1. Open the Memory Test (RAM) in the browser you updated. Note the browser version from its About page so you can compare it with your earlier version if you have a saved result.
2. Close downloads, video streams, games, and other demanding apps. Keep the computer plugged in if it is a laptop, and wait a few minutes after startup so background activity can settle.
3. Run the test and note the copy speed, the score out of 100, and the other memory results. Do not use the computer for other tasks while the test is running.
4. Run it two more times under the same conditions. Compare the three results with each other and with a pre-update score from the same device and browser, if you have one.

For a fair comparison, keep the power mode, browser, number of open tabs, and connected displays as similar as possible. A score from a different device or browser is not a reliable before-and-after comparison.

What the result means

Copy speed is lower in every run

A repeatable drop means the current test environment is producing a lower result. It does not prove that the RAM has become slower or damaged. A browser update can change how JavaScript code is compiled and scheduled, and background tasks can compete for processor time or memory bandwidth. Check the fixes below before drawing a hardware conclusion.

One run is low, but the others are close to your old score

That points more toward temporary variation than a lasting change. A tab loading content, an update finishing in the background, or a warm processor changing speed can affect a short benchmark. Use the middle result from several runs as a practical comparison, not the single highest or lowest score.

Copy speed changed, but read and write results did not change much

Copying memory involves both reading and writing data, so it can respond differently from either operation alone. The test also runs inside the browser, where its timing and workload can be affected by browser changes. For more context on how these measurements differ, see why RAM copy speed differs from read speed.

All memory results are lower, and other tasks feel slower

Look beyond the browser. A power-saving mode, heavy background workload, or heat-related slowdown can affect several tests and everyday apps. If the whole computer has become sluggish, check the system and repeat the test after it is idle and cool.

How to check for a browser or system cause

1. Restart the browser. Close all browser windows, reopen the browser, and run the test again. This clears out a browser session that may have accumulated tabs or background work. Save any open work first.
2. Compare with extensions paused. Temporarily turn off extensions that alter pages, block scripts, or use substantial memory, then rerun the test. Restore them afterward. If the result changes, re-enable them one at a time to find a possible source of the difference.
3. Check background activity. Close unused apps and tabs, and wait for cloud sync, downloads, or software updates to finish. On Windows 11, open Settings › System › Power & battery and check that the power mode matches the one used for your earlier test. On macOS, check System Settings › Battery on a laptop, and compare results with the same power conditions.
4. Keep the computer at a similar temperature. Let it cool if it feels hot or its fans are running hard, then repeat the test. Do not run several demanding benchmarks back to back. Heat can reduce processor speed, which may affect a browser-based memory test.
5. Try another browser as a comparison. Run the test in a second up-to-date browser on the same computer, with similar tabs and power conditions. A difference between browsers suggests their engines or settings may affect the score. It does not identify a failing component by itself.
6. Restart the computer and retest. A restart can clear stuck processes and finish pending updates. After startup, wait until activity settles, then repeat three runs. If the lower score remains, note the browser version, operating system, and results before seeking support.

When to suspect a memory problem

A browser memory score is a performance measurement, not a complete RAM diagnostic. It cannot confirm that memory chips are error-free, identify a defective module, or reliably tell you the exact amount of installed RAM. If the computer also crashes, freezes, shows error messages, or fails its built-in memory check, use the diagnostic provided by your computer maker or operating system, or contact a repair professional.

If your computer works normally and only the browser test changed after an update, repeatable comparisons are a better next step than replacing memory. Keep a note of the date, browser version, power mode, and several scores so you can spot a lasting pattern rather than react to one run.