Node-webkit preview takes forever to load

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  • 5 posts
  • Link to .capx file (required!):

    Steps to reproduce:

    1. Run preview with node-webkit



    Observed result:

    Harddisk loads like mad but the preview never executes. To stop it I need to kill the nw.exe processes in Task Manager, which also takes a loooong time to complete. This only happens the first time I try to run preview, on subsequent runs preview only takes about a couple of seconds to get going. Closing and re-opening C2 makes no difference; if I've already run Node-webkit preview once after a fresh boot it will always run without problems. Also doesn't happen with exported Node-webkit.

    Expected result:

    Browsers affected:

    Chrome: no

    Firefox: ?

    Internet Explorer: ?

    Operating system & service pack:

    Windows 7 64-bit. Service pack 1

    Construct 2 version:


    This started to happen around r142-r143 I think? Definitely sometime between r139 and r146. It doesn't seem to happen with new capx'es.

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  • Your example started after about 1.5 seconds for me.

    Maybe something on your system is slowing it down? Anti-virus scanning? Recent MicroS**t updates?

    What does Task Manager show when you try launching?

  • Task manager says:

    Processes running -> 2 nw.exe, no game.exe.

    Disk usage is hogged by nw.exe reading at about 250 kb/second. svchost.exe also uses quite a bit: 130 kb/s.

    No antivirus software installed, just comodo firewall. But the firewall always informs me if it decided to block something it doesn't trust so I don't think that's it.

  • Node-webkit preview used to leak files on disk - some users reported hundreds of thousands of files. We fixed this by making it clear the cache on startup starting with r152, but if it has leaked a lot of files, it will take a long time to clear the cache on the first run.

    Workaround: delete all the files for the project in your %appdata% folder, and preview again - it should start faster then.

  • Wow! Over two hundred thousand in my case :P Thanks, that worked nicely.

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