[llvm-bugs] [Bug 48229] New: clang-format performance issues with nested lambdas - 3h to prettify a single file

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48229

            Bug ID: 48229
           Summary: clang-format performance issues with nested lambdas -
                    3h to prettify a single file
           Product: clang
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: officesamurai at gmail.com
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

Created attachment 24184
  --> https://bugs.llvm.org/attachment.cgi?id=24184&action=edit
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
---

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