Minor performance improvements (#975)

* Skip head and grep and do it all in sed

* Replace echo and awk with a parameter expansion

.local/bin/compiler

@@ -53,5 +53,5 @@ case "$ext" in
 	scad) openscad -o "$base".stl "$file" ;;
 	sent) setsid -f sent "$file" 2>/dev/null ;;
 	tex) textype "$file" ;;
-	*) head -n1 "$file" | grep "^#!/" | sed "s/^#!//" | xargs -r -I % "$file" ;;
+	*) sed -n '/^#!/s/^#!//p; q' "$file" | xargs -r -I % "$file" ;;
 esac

.local/bin/queueandnotify

@@ -7,7 +7,7 @@ queuefile="${XDG_DATA_HOME:-$HOME/.local/share}/newsboat/queue"
 
 while read -r line; do
 	[ -z "$line" ] && continue
-	url="$(echo "$line" | awk '{print $1}')"
+	url="${line%%[	 ]*}"
 	qndl "$url" "curl -LO"
 done < "$queuefile"