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    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - clang-format performance issues with nested lambdas - 3h to prettify a single file"
   href="https://bugs.llvm.org/show_bug.cgi?id=48229">48229</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-format performance issues with nested lambdas - 3h to prettify a single file
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>11.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Formatter
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>officesamurai@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=24184" name="attach_24184" title="The code in question">attachment 24184</a> <a href="attachment.cgi?id=24184&action=edit" title="The code in question">[details]</a></span>
The code in question

It looks like the formatting of nested lambdas has exponential cost.

---
$ /home/brd/soft/llvm-11.0.0/bin/clang-format --version
clang-format version 11.0.0

$ time cat nested_lambdas.cpp | /home/brd/soft/llvm-11.0.0/bin/clang-format
-style=LLVM
void foo() {
--- skipped ---
}

real    182m4.186s
user    181m57.792s
sys     0m3.568s
---</pre>
        </div>
      </p>


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