Add bench-compare script

Author: r-devulap

scripts/bench-compare.sh

@@ -0,0 +1,20 @@
+#~/bin/bash
+set -e
+branch=$(git rev-parse --abbrev-ref HEAD)
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd $SCRIPT_DIR/..
+if [[ -z "${GBENCH}" ]]; then
+    echo "Please set env variable GBENCH and re run"
+    exit 1
+fi
+
+compare=$GBENCH/tools/compare.py
+if [ ! -f $compare ]; then
+    echo "Unable to locate $GBENCH/tools/compare.py"
+    exit 1
+fi
+
+meson setup --warnlevel 0 --buildtype plain builddir-${branch}
+cd builddir-${branch}
+ninja
+$compare filters ./benchexe $1 $2