René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"The performance gap between node16 and node21 changes as the n of the benchmark changes","articleBody":"### Version\r\n\r\nnode 16.x and node 21.1\r\n\r\n### Platform\r\n\r\nLinux wpe-icx 6.2.0-26-generic #26~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Jul 13 16:27:29 UTC 2 x86_64 x86_64 x86_64 GNU/Linux\r\n\r\n### Subsystem\r\n\r\n_No response_\r\n\r\n### What steps will reproduce the bug?\r\n\r\nI tested node-benchmark `es/string-concatenations.js`  with `node 21.1` and `node 16.x`.\r\n\r\nWhen `n` is the default `1e3`, the score difference between the two version reaches `50%`. \r\n\r\nBut when `n` is set to `5000` or `10000` or other larger numbers, there is no performance gap between the two versions. \r\n\r\n### How often does it reproduce? Is there a required condition?\r\n\r\n_No response_\r\n\r\n### What is the expected behavior? Why is that the expected behavior?\r\n\r\nExpected\r\n- When I adjust n to 5e3 or 1e4, the score difference between the two versions should remain around 50%.\r\n\r\nReason\r\n- I think the number of `n` has not changed much, and the performance gap between `node 16.x` and `node 21.1` should not change so much too.\r\n\r\n### What do you see instead?\r\n\r\n- n = 1e3 (default number)\r\n```\r\nNODE 16.x  es/string-concatenations.js mode=\"multi-join\" n=1000: 2,275,198.9661495895\r\nNODE 21.1  es/string-concatenations.js mode=\"multi-join\" n=1000: 975,159.7555469525\r\n```\r\n- n = 5e3\r\n```\r\nNODE 16.x  es/string-concatenations.js mode=\"multi-join\" n=5000: 1,972,248.1025001006\r\nNODE 21.1  es/string-concatenations.js mode=\"multi-join\" n=5000: 1,983,125.977681107\r\n```\r\n- n = 1e4\r\n```\r\nNODE 16.x  es/string-concatenations.js mode=\"multi-join\" n=10000: 2,678,989.303063612\r\nNODE 21.1  es/string-concatenations.js mode=\"multi-join\" n=10000: 2,739,590.924283186\r\n```\r\n\r\n### Additional information\r\n\r\nI'm not sure whether this problem can be counted as an issue. Or is this a pre-existing problem?","author":{"url":"https://github.com/Septa2112","@type":"Person","name":"Septa2112"},"datePublished":"2023-11-06T08:34:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/50571/node/issues/50571"}