This is a project written using Express, with the language Node.
The goal was to fulfill the requirements of the "Rinha Backend - API Challenge".
The idea was to create a very simple set of API endpoints and run against a Gatling scenario stress-test, as per the instructions above.
You can use the "docker-compose.yml" provided to spin up the environment with the resource restrictions from the challenge and run the Gatling script against it.
When you want to run the stress test and monitor each container, you can use tmuxp to open htop to monitor the app, postgres, redis and nginx with:
tmuxp load tmux-monitor.yaml
Click here for the Gatling stress-test simulation script.
This is Gatling's results:
================================================================================
---- Global Information --------------------------------------------------------
> request count 61503 (OK=61448 KO=55 )
> min response time 0 (OK=0 KO=1 )
> max response time 1040 (OK=1040 KO=381 )
> mean response time 30 (OK=30 KO=105 )
> std deviation 100 (OK=100 KO=115 )
> response time 50th percentile 3 (OK=3 KO=62 )
> response time 75th percentile 21 (OK=21 KO=156 )
> response time 95th percentile 94 (OK=94 KO=344 )
> response time 99th percentile 640 (OK=640 KO=363 )
> mean requests/sec 251.033 (OK=250.808 KO=0.224 )
---- Response Time Distribution ------------------------------------------------
> t < 800 ms 61303 (100%)
> 800 ms <= t < 1200 ms 145 ( 0%)
> t >= 1200 ms 0 ( 0%)
> failed 55 ( 0%)
---- Errors --------------------------------------------------------------------
> status.find.in(422), but actually found 200 20 (36,36%)
> jmesPath(ultimas_transacoes[0].descricao).find.is(danada), but 12 (21,82%)
actually found toma
> jmesPath(ultimas_transacoes[0].descricao).find.is(danada), but 8 (14,55%)
actually found descricao
> jmesPath(ultimas_transacoes[0].descricao).find.is(devolve), bu 3 ( 5,45%)
t actually found toma
> j.u.NoSuchElementException: No attribute named 'limite' is def 3 ( 5,45%)
ined
> jmesPath(saldo.total).find.is(0), but actually found 35995 2 ( 3,64%)
> jmesPath(ultimas_transacoes[0].descricao).find.is(devolve), bu 2 ( 3,64%)
t actually found descricao
> jmesPath(saldo.total).find.is(0), but actually found 2358 1 ( 1,82%)
> jmesPath(saldo.total).find.is(0), but actually found 1327 1 ( 1,82%)
> jmesPath(saldo.total).find.is(0), but actually found 2525 1 ( 1,82%)
> jmesPath(saldo.total).find.is(0), but actually found 12800 1 ( 1,82%)
> jmesPath(saldo.total).find.is(-25), but actually found 35994 1 ( 1,82%)
================================================================================
- Install deps
npm install - Run
npm start
- Install Docker
- Run
docker compose up -f dev-docker-compose.yml
To configure the container, update the docker-compose.yml file, and the docker/development.dockerfile file.
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