Nodejs spends a lot of time when using replace and regular expression replacement.

[FuHongBiao]

Version

v21.1.0

Platform

windows & linux

Subsystem

replace

What steps will reproduce the bug?

let str = `<a name=\"_Changes\"></a><font face=\"Calibri, seri`
const res = str.replace(reg, '<div id="$1" style="visibility: none;"></div>');
console.log(res);

For such a simple string, str.replace takes nearly 1 minute.

How often does it reproduce? Is there a required condition?

No response

What is the expected behavior? Why is that the expected behavior?

No response

What do you see instead?

Additional information

No response

[VoltrexKeyva]

This has nothing to do with Node.js, your regular expression causes catastrophic backtracking across almost every regex engine out there.

See this test and an explanation of runaway regular expressions.

If you also launch the debugger in that test you'll see almost 120k steps being walked through because of that backtracking.

[benjamingr]

Additionally, js engine bugs should be reported to V8 directly and not us, we can't fix them here anyway :)