XML#xpath(String) is Extremely Slow on Large Files

[volodya-lombrozo]

I have a large XML file and run the following java code on it:

private static String findName(final XML program) {
   return program.xpath("/program/@name").stream().findFirst().orElse("unknown");
}

It runs extremely long (minutes). Could you speed up this method, please?

Here is my XML:
Pointer.xmir.txt

XML is instance of XMLDocument.

[volodya-lombrozo]

@yegor256 Could you have a look, please?

[volodya-lombrozo]

Profiling proofs:
flamegraph-disassemble-44918 copy.html.txt

[yegor256]

@volodya-lombrozo why do you think it may be faster?

[volodya-lombrozo]

@yegor256 I showed it here: objectionary/lints#210

[yegor256]

@volodya-lombrozo xpath() is using nodes() under the hood, that's why I believe this ticket is a duplicate of #288