Reduce lag by running just before playing melee. Script turns off screen scaling to reduce GPU usage

beforemeleemac.command

#!/bin/bash

echo '
###                                       ###
##### Melee screen resolution optimizer #####  falconscript
###                                       ###

'

## How to use: 
# Run each time just before you play melee

## What it does:
# Turns off retina screen interpolation/scaling (easily undo in System Preferences)

## Why that's good:
# Reduces the weird spikes/lag on mac by reducing GPU/CPU peaks
# If you're a mac user you know what I'm talking about. Retina macs have weird spikes man



# fix working dir to dir of script
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
cd "$DIR"

# Download resolution changing tool if needed
if ! [ -e "./screen-resolution-switcher" ]; then 
  echo "[+] Downloading screen resolution switcher tool..."
  git clone https://github.com/th507/screen-resolution-switcher.git > /dev/null 2>&1
  cd screen-resolution-switcher
  if ! [ -z "`which make`" ]; then
    make > /dev/null 2>&1 # compile faster version if we can have it
  fi

  cd ..
fi

cd screen-resolution-switcher

# determine if we can use faster tool
if [ -e "./retina" ]; then
  tool="./retina"
else
  tool="./scres.swift"
fi

# Get current resolution width (used as ID for tool)
curWidth=$( "$tool" -l 0 | egrep -Eo "\d{2,}\ \*" | sed 's# \*##g' )
allWidths=$( "$tool" -m | egrep -Eo "\d{2,}\ \*" | sed 's# \*##g' | tr "\n" ',' )
# also swap newlines for commas ^

closestMatch () {
  # $1 is needle and $2 is haystack
  echo "$2" | awk -v "VAL=$1" -v RS="," '{
    D=(VAL - $1) * (VAL - $1);
    if((!SET) || (D < DIFF)) {
      DIFF=D;
      X=$1;
      SET=1;
    }
  }
  END { printf("%s", X); }'
}

# Always get the closest width to 1024 instead - optimizes rendered pixels
#targetRes=`closestMatch $curWidth "$allWidths"`
targetRes=`closestMatch 1024 "$allWidths"`
echo "[+] Setting display width to $targetRes"

# Change display to NON-SCALED version of this lower resolution
"$tool" set $targetRes

# no idea how to to change back via command line with scaling
# just use System Preferences -> Display and click the one you like

echo "[+] READY FOR MELEE. To revert resolution, Go to System Preferences -> Display"
echo "[+] You may close this window."
echo
echo