OpenAsar/src/cmdSwitches.js

const { app } = require('electron');

const presets = {
  'base': '--autoplay-policy=no-user-gesture-required --disable-features=WinRetrieveSuggestionsOnlyOnDemand,HardwareMediaKeyHandling,MediaSessionService', // Base Discord
  'perf': `--enable-gpu-rasterization --enable-zero-copy --ignore-gpu-blocklist --enable-hardware-overlays=single-fullscreen,single-on-top,underlay --enable-features=EnableDrDc,CanvasOopRasterization,BackForwardCache:TimeToLiveInBackForwardCacheInSeconds/300/should_ignore_blocklists/true/enable_same_site/true,ThrottleDisplayNoneAndVisibilityHiddenCrossOriginIframes,UseSkiaRenderer,WebAssemblyLazyCompilation --disable-features=Vulkan --force_high_performance_gpu`, // Performance
  'battery': '--enable-features=TurnOffStreamingMediaCachingOnBattery --force_low_power_gpu' // Known to have better battery life for Chromium?
};


module.exports = () => {
  for (const [ key, ...values ] of Object.values([ 'base', ...(oaConfig.cmdPreset || 'perf').split(',') ].reduce((acc, x) => {
    for (const cmd of (presets[x] || '').split(' ')) {
      if (!cmd) continue;
  
      const [ key, value ] = cmd.split('=');
  
      if (!acc[key]) acc[key] = [key];
      acc[key].push(value);
    }
  
    return acc;
  }, {}))) {
    app.commandLine.appendSwitch(key.replace('--', ''), values.join(','));
  }
};