Docker deployment in Laravel - Performance & Optimization

Performance: Docker deployment

MEDIUM IMPACT

Docker deployment affects the initial page load speed and server response time by controlling how the Laravel app and its dependencies are packaged and started.

Deploying a Laravel app with Docker for fast startup and minimal resource use

Laravel

FROM php:8.1-fpm-alpine
RUN apk add --no-cache git unzip
WORKDIR /app
COPY composer.json composer.lock ./
RUN composer install --no-dev --optimize-autoloader
COPY . .
EXPOSE 9000
CMD ["php-fpm"]

Uses lightweight Alpine base, caches composer dependencies, and avoids installing dev packages, reducing image size and startup time.

📈 Performance GainReduces image size by 300MB+, container starts in under 5 seconds

Deploying a Laravel app with Docker for fast startup and minimal resource use

Laravel

FROM php:8.1-apache
RUN apt-get update && apt-get install -y git unzip
COPY . /var/www/html
RUN composer install
EXPOSE 80
CMD ["apache2-foreground"]

This Dockerfile installs unnecessary packages and runs composer install on every build, causing large image size and slow container startup.

📉 Performance CostAdds 500MB+ to image size, blocks container startup for 20+ seconds

Performance Comparison

Pattern	Image Size	Startup Time	Resource Usage	Verdict
Heavy base image with full PHP and Apache	Large (700MB+)	Slow (20+ seconds)	High CPU and Memory	[X] Bad
Lightweight Alpine PHP-FPM with cached dependencies	Small (200-400MB)	Fast (under 5 seconds)	Low CPU and Memory	[OK] Good

Rendering Pipeline

Docker deployment impacts the server environment setup before the Laravel app serves requests, affecting how quickly the server can respond and deliver content to the browser.

→Server Startup

→Request Handling

→Response Delivery

⚠️ BottleneckServer Startup time due to image size and dependency installation

Core Web Vital Affected

LCP

Docker deployment affects the initial page load speed and server response time by controlling how the Laravel app and its dependencies are packaged and started.

Optimization Tips

1Use minimal base images like Alpine to reduce Docker image size.

2Cache composer dependencies to avoid reinstalling on every build.

3Avoid installing unnecessary packages and dev dependencies in production images.

Performance Quiz - 3 Questions

What Docker deployment practice improves Laravel app startup speed?

A Installing all packages including dev dependencies on every build

B Copying the entire project before installing dependencies

C Using a lightweight base image and caching dependencies

D Using a full PHP-Apache image without optimization

DevTools: Network and Performance panels

How to check: Use Performance panel to measure server response time and Network panel to check time to first byte (TTFB) after deployment.

What to look for: Look for reduced TTFB and faster server response indicating efficient Docker deployment.