<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/83122>83122</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            OOM when compiling a medium size c++ code
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          niXman
      </td>
    </tr>
</table>

<pre>
    hello,

I was just trying to compile my hobby project: https://github.com/niXman/cmdargs
I was unpleasantly surprised that when using `clang` all available 14Gb memory was used, while when using `GCC` only 1.2 Gb of memory was used!

at the same time, the same code when using clang takes three times longer to compile!
clang: 1m24,296s
gcc: 0m31,485s

cmdline used:
clang: time clang++15 -std=c++17 main.cpp -I../include -omain
gcc: time g++ -std=c++17 main.cpp -I../include -omain

clang version:
> Ubuntu clang version 15.0.7
> Target: x86_64-pc-linux-gnu
> Thread model: posix
> InstalledDir: /usr/bin

gcc version:
> g++ (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0
> Copyright (C) 2022 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

any thoughts?


best!
</pre>
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