#!/bin/bash
#DivestOS: A privacy focused mobile distribution
#Copyright (c) 2017-2019 Divested Computing Group
#
#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <https://www.gnu.org/licenses/>.

#Attempts to increase performance and battery life
#Last verified: 2018-04-27

echo "Optimizing...";

if enter "frameworks/base"; then
sed -i 's/ScaleSetting = 1.0f;/ScaleSetting = 0.5f;/' services/java/com/android/server/wm/WindowManagerService.java &>/dev/null || true;
sed -i 's/AnimationScale = 1.0f;/AnimationScale = 0.5f;/' services/java/com/android/server/wm/WindowManagerService.java &>/dev/null || true;
sed -i 's/DurationnScale = 1.0f;/DurationScale = 0.5f;/' services/java/com/android/server/wm/WindowManagerService.java &>/dev/null || true;
sed -i 's/ScaleSetting = 1.0f;/ScaleSetting = 0.5f;/' services/core/java/com/android/server/wm/WindowManagerService.java &>/dev/null || true;
sed -i 's/AnimationScale = 1.0f;/AnimationScale = 0.5f;/' services/core/java/com/android/server/wm/WindowManagerService.java &>/dev/null || true;
sed -i 's/DurationnScale = 1.0f;/DurationScale = 0.5f;/' services/core/java/com/android/server/wm/WindowManagerService.java &>/dev/null || true;
#sed -i 's|||'
fi;

if enter "kernel"; then
sed -i "s/#define VM_MAX_READAHEAD\t128/#define VM_MAX_READAHEAD\t512/" ./*/*/include/linux/mm.h; #Lee Susman <lsusman@codeaurora.org>: Change the VM_MAX_READAHEAD value from the default 128KB to 512KB. This will allow the readahead window to grow to a maximum size of 512KB, which greatly benefits to sequential read throughput.
fi;

cd "$DOS_BUILD_BASE";
echo "Optimizing complete!";