n9mi/db-email

Experiment to compare the time execution of sending emails without and with applying concurrency in Go

db-email

Experiment to compare the time execution of sending emails without and with applying concurrency in Go. Stable internet connection is required to run this project.

Stacks

• Go
• go-mail
• Gorm
• Viper
• PostgreSQL
• Docker

Installation an running

1. Configure smtp host, port, and other credentials from .env

   cp .env.example .env
   

   Then open .env to:
   • configure EMAIL_DEFAULT_SENDER to your GMail account
   • configure EMAIL_DEFAULT_RECIPIENT to default email destination
   • configure EMAIL_APP_PASSWORD from password that you should already get from Google App Password
   • configure NUM_EMAIL_SEEDS to set how many emails you want to sent to EMAIL_DEFAULT_RECIPIENT.
2. Run the app with docker. Make sure you have already install Docker and docker compose in your system.

   docker compose up --build
   

3. Wait for a few seconds. This process will takes more seconds or even minutes depending on your internet connection and NUM_EMAIL_SEEDS that you have been set.

   INFO[0057] successfully send 10 emails and failed to send 0 (total: 10) in 56.745299 seconds without concurrency
   INFO[0071] successfully send 10 emails and failed to send 0 (total: 10) in 13.746935 seconds with concurrency