eeschema very slow copying nets

[SFEN]

Hi,

I am using the latest nightly kicad version, and a large project (>130k nets, 121 sheets). After upgrading to the latest kicad version from 5.1, eescheme has become very, very, slow.

As an example, copying a single netname, now takes around 10s.

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To reproduce;

1. Click on a netname.

2. Copy it with 'c'.

3. Paste the copied net name.

I expect that it's immediately copied, like it was in 5.1, but now eescheme stops responding for around 10s, and then it pastes it.

This does not happen when I try and move a netname, only when I paste a label that I copied.

I am working on the same design as the one here: https://bugs.launchpad.net/kicad/+bug/1825268

===

I am using this version;
Application: kicad
Version: (5.1.0-344-gd281f051e), release build
Libraries:
    wxWidgets 3.0.4
    libcurl/7.61.1 OpenSSL/1.1.1 zlib/1.2.11 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.4) libssh2/1.8.0 nghttp2/1.33.0
Platform: Linux 4.18.12-arch1-1-ARCH x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 2.24
    Boost: 1.68.0
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.61.1
    Compiler: GCC 8.2.1 with C++ ABI 1013

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=OFF
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[Jon Evans (craftyjon)]

This should be worked around by c054944
Please advise if you have problems after the next nightly build