René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"High cpu usage for outbound ssl requests after upgrading from v16.15.0 to v18.1.0","articleBody":"### Version\n\nv18.1.0\n\n### Platform\n\nLinux 5.17.4-arch1-1 #1 SMP PREEMPT Wed, 20 Apr 2022 18:29:28 +0000 x86_64 GNU/Linux\n\n### Subsystem\n\ncrypto\n\n### What steps will reproduce the bug?\n\nI have observed this problem in few http clients: axios, got. But looks like a problem is in node.js itself. \r\n\r\n1. Create a basic http server which produces outbound ssl requests and returns in response result of outbound request. Here is a sample\r\n```js\r\nconst http = require(\"http\");\r\nconst https = require(\"https\");\r\n\r\nconst port = 3000;\r\n\r\nconst handler = (req, res) =\u003e {\r\n  https.get(\"https://server.local\", (response) =\u003e {\r\n    let body = \"\";\r\n\r\n    response.on('data', chunk =\u003e {\r\n      body += chunk;\r\n    });\r\n\r\n    response.on(\"end\", () =\u003e {\r\n      res.statusCode = response.statusCode;\r\n      res.setHeader('Content-Type', 'text/plain');\r\n      res.end(body);\r\n    });\r\n  });\r\n};\r\n\r\nconst server = http.createServer(handler);\r\n\r\nserver.listen(port);\r\n```\r\n2. Start to produce load to server. I'm using `hey`\r\n```\r\nhey -z 1m -c 10 -disable-keepalive \"http://client.local:3000\"\r\n```\r\n3. Observe in CPU profiler for node.js server constantly increasing cpu usage for `SecureContext.init()`. It starts from ~50% and going up to 80%. Amount of requests processed by server, which sends outbound https requests is constantly decreasing.\n\n### How often does it reproduce? Is there a required condition?\n\nAlways reproduces if present outbound ssl requests and node version 18.1.0\n\n### What is the expected behavior?\n\nConstant CPU usage, amount of processed requests is at the same level during time. In node.js v16.15.0 same code in CPU profiler have `SecureContext.init()` with usage of 5-8%. And during load there is no performance degradation.\n\n### What do you see instead?\n\nCPU usage is keeping increasing during time, `SecureContext.init()` starts from ~50% cpu time in profiler and keep growing during time to 80-85%. Amount of requests processed by server is constantly decreasing.\r\n\n\n### Additional information\n\nv18.1.0\r\nBenchmark result - 186 req/s\r\nnode --perf output - https://pastebin.com/wyHPXfMH\r\ncpu profile screenshot\r\n![cpu_profile_v18 1 0](https://user-images.githubusercontent.com/1708854/168877260-03e8c28e-3744-4f40-8869-7bec2ff1ea16.png)\r\n\r\nv16.15.0\r\nBenchmark result - 1184 req/s\r\nnode --perf output - https://pastebin.com/0L0Z01iq\r\ncpu profile screenshot\r\n![cpu_profile_v16 15 0](https://user-images.githubusercontent.com/1708854/168877342-2330d40c-2ef9-4b15-92ff-926e3d41207c.png)\r\n\r\n","author":{"url":"https://github.com/str1ke","@type":"Person","name":"str1ke"},"datePublished":"2022-05-17T17:55:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":18},"url":"https://github.com/43128/node/issues/43128"}