Optimizations

[Carterpersall]

This will be where I keep track of the improvements to Winfetch I make in various pull requests

How I achieve my speed improvements:

• Assume anything CIM and WMI will be slooooow and avoid it like the devil
• Use https://github.com/nohwnd/Profiler and import generated JSON files into https://www.speedscope.app/ or view results directly in PowerShell
  • Shows which functions take the longest, but not what operations within the function take the longest. That takes looking into the function yourself and heavily leveraging Measure-Command
• I downclock my laptop hard (1.06 Ghz) to get more battery life out of it. But what ends up happening with PowerShell is that slow operations take a veeery long time to execute, making speed differences much more noticeable
• Use preexisting values wherever possible
• Google things a lot. Even if you think you know how to do something fast, there may be a faster or easier solution out there

Done:

• Optimized GPU fetching
  • Instead of using Get-CimInstance to get GPU information, which can be very slow, gets the registry entries at 'HKLM:\SOFTWARE\Microsoft\DirectX', which contains a list of video adapters
  • 1690 ms -> 40.16 ms
    • 42x faster (nice)
• Made info_locale speedy
  • Takes the registy entries at HKCU:Control Panel\International to get region code and language code, and passes them into two very large hash tables to get the accompanying region and language values.
  • 3251 ms -> 12.43 ms
    • 262x Faster

TODO:

• [ ] Attempt to optimize expensive functions
  • [ ] info_ps_pkgs
    • 6630 ms
  • [ ] info_pkgs
    • 2400 ms
  • [x] info_gpu
    • #155
    • 1640 ms -> 40.16 ms
      • 42x faster (nice)
  • [ ] info_cpu_usage
    • 1100 ms
  • [x] info_locale
    • #154
    • 3251 ms -> 12.43 ms
      • 262x Faster
  • [ ] info_weather
    • 433 ms
    • Not sure there is much I can do to speed this up
  • [ ] info_local_ip
    • 1960 ms
    • Get-NetRoute is slow
• [x] Implement multithreading
  • #150
• [ ] Look into incorrect resolution being reported
  • #156

Speed Improvement (Excluding Multithreading): Before:

• 18715 ms
• profiler_0001.speedscope.zip
  • Extract and upload to https://www.speedscope.app/ to view

After (Subtracting Speed Gains):

• 13877 ms
  • 26% Faster w. everything enabled