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  1. Qt Creator
  2. QTCREATORBUG-29303

Creator gets unresponsive when inserting new lines in huge C++ files

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    Description

      Steps to reproduce:

      1. Open huge file (I used sqlite3.c from <creator src>/src/libs/3rdparty/sqlite)
      2. Make sure cursor is positioned at the beginning of the file
      3. Insert a new line by pressing enter

      After that Qt Creator freezes for several minutes here.

      I put a scoped pointer into ClangFormatForwardingIndenter::indent and it also takes around 200ms for big files like the texteditor.cpp

      All measurements and tests have been done with a release version of Qt Creator and ClangFormat. It gets notably worse when using debug builds of those.

      This is not reproducible if Qt Creator is started without the ClangFormat plugin.

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            artem.sokolovskii Artem Sokolovskii (Inactive)
            davschul David Schulz
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              Resolved:

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