Making `docker-compose exec` faster by proxying it via `docker exec`. Courtesy (https://github.com/docker/compose/issues/4748#issuecomment-561438269)

docker-exec.sh

#!/usr/bin/env bash

docker-compose-exec() {
    local ARG=''
    local ARGS=''
    local COUNT=0
    local DIR=$(basename $(pwd))
    for ARG in "$@"; do
        case $ARG in
            -*)
                ARGS="$ARGS $ARG"
            ;;
            *)
                # first positional arg is container name, replace with container id
                if [ $COUNT == 0 ]; then
                    ARG=$(docker ps -q --filter "name=${DIR}_${ARG}")
                fi
                ARGS="$ARGS $ARG"
                COUNT=$((COUNT+1))
            ;;
        esac
    done
    docker exec -it $ARGS
}

docker-compose-exec "$1" "$2"

Use it as

./docker-exec.sh app "npm install some-package"