I have an app that laravel app that can generate excel file. The performance of excel generation was much slower in docker container. I am using laravel excel for generating the excel file.

# For more information: https://laravel.com/docs/sail
services:
  mysql:
    image: 'mysql:8.0'
    ports:
      - '3306:3306'
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
    volumes:
      - 'mysql:/var/lib/mysql'
    networks:
      - otonometer

  zipkin:
    image: openzipkin/zipkin:latest
    ports:
      - '9411:9411'
    networks:
      - otonometer

  otonometer:
    build:
      context: .
      dockerfile: Dockerfile
    develop:
      watch:
        - action: sync+restart
          path: ./nginx/otonometer.com.conf
          target: /etc/nginx/sites-available/otonometer.com.conf
        - action: sync+restart
          path: ./nginx/nginx.conf
          target: /etc/nginx/nginx.conf
        - action: sync
          path: ./
          target: ./var/www/webcore_app
          ignore: [./nginx, ./php, ./mysql]
    ports:
      - "${APP_PORT:-80}:80"
    environment:
      - OTP_URL=zipkin
      - OTP_PORT=9411
    depends_on:
      - mysql
      - zipkin
    networks:
      - otonometer
networks:
  otonometer:
    driver: bridge
volumes:
  mysql:

This is my docker-compose.yml file. And this is my Dockerfile

# Use the official PHP image as the base image
FROM php:8.1.0-fpm
# Set the working directory
WORKDIR /var/www/webcore_app

RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"

## View files
RUN ls -la

## Install dependencies
RUN apt-get clean
RUN apt-get update -yqq &&
    apt-get install -y nginx && 
    apt-get clean && 
    rm -rf /var/lib/apt/lists/*

# Update package manager and install dependencies for PHP extensions
RUN apt-get update && apt-get install -y 
    libfreetype6-dev 
    libjpeg62-turbo-dev 
    libpng-dev 
    libicu-dev 
    libbz2-dev 
    libxml2-dev 
    libzip-dev 
    zip 
    unzip 
    mariadb-client 
    && docker-php-ext-configure gd --with-freetype --with-jpeg 
    && docker-php-ext-install -j$(nproc) pdo_mysql zip bcmath pcntl exif gd intl opcache xml bz2 
    

# Clean up to reduce the image size
RUN apt-get clean && rm -rf /var/lib/apt/lists/*

RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

# Copy the Laravel project files into the container
COPY composer.json composer.lock ./

# Install Laravel dependencies using Composer
RUN composer install --no-scripts --no-autoloader

# Copy the rest of the Laravel project files into the container
COPY . .

# Set the correct permissions for the storage and cache directories
RUN chown -R www-data:www-data /var/www/webcore_app/storage /var/www/webcore_app/bootstrap/cache
RUN chmod -R 775 /var/www/webcore_app/storage /var/www/webcore_app/bootstrap/cache


# Now run autoloader optimization
RUN composer dump-autoload --optimize

# Copy and configure Nginx
COPY ./nginx/otonometer.com.conf /etc/nginx/sites-available/otonometer.com.conf
COPY ./nginx/nginx.conf /etc/nginx/nginx.conf

ADD ./php/php.ini /usr/local/etc/php/conf.d

RUN ln -s /etc/nginx/sites-available/otonometer.com.conf /etc/nginx/sites-enabled

RUN nginx -t

EXPOSE 80

# Start Nginx and PHP-FPM
CMD ["sh", "-c", "service nginx start && php-fpm"]

I have suspissions on whether there are some volume attached/mounted to my local host, because i just known that if my app is mounted to host machine it will make performance much slower. But when i look at mount and volumne page on docker console, there were no volume and mount attached. Maybe some one can help me, i am new at docker.