Chrono Flow is a Laravel project focused on high-performance backend data processing. It lets you upload a large (≈80 MB) CSV simulating a work log of 1,000,000 entries. Once submitted, the app quickly extracts and inserts all records into a MySQL database. Such a large number of entries would be preferably handled in a queue, but to show the performance it was done in a single request.

Key Technologies used:

• Laravel 12
• MySQL
• Nginx
• Docker + Docker Compose
• Alpine.js & Tailwind CSS
• PestPHP

• Clone the repository:

git clone https://github.com/benjamimWalker/chrono-flow.git

• Go to the project folder:

cd chrono-flow

• Prepare environment files:

cp .env.example .env

• Build the containers:

docker compose up -d

• Install composer dependencies:

docker compose exec app composer install

• Run the migrations:

docker compose exec app php artisan migrate

• Install npm dependencies:

docker compose run --rm npm install

• Build the assets:

docker compose run --rm npm run build

• You can now execute the tests:

docker compose exec app php artisan test

There is a python script on the root folder that generates a CSV file with 1,000,000 entries. You can run it and upload the file to the application. Navigate to the home page at http://localhost and upload the CSV.

After importing, the app redirects to a results page that lists all entries paginated.

The main features of the application are:

• High-speed processing of large CSV files using Laravel 12's new concurrency features.
• Bulk insertion of up to 1,000,000 records into MySQL in a few seconds.
• Full test coverage with PestPHP.
• Clean, maintainable Laravel 12 code with proper architecture.

[Benjamim] - [benjamim.sousamelo@gmail.com] Github: @benjamimWalker