readme.md

benchmark

This is not really a benchmark, but rather a toy application to assess the performances of the library in a real world use case, versus different baselines: the same fastify application built with the popular template engines pug (the one I would use by default) and ejs(a very popular one in the community with 13M weekly downloads).

The application

The application is a blog page where posts are loaded from a fake database. To simulate some latency we run the following code:

const LATENCY = env.DB_LATENCY || 10;

export async function getPosts() {
  const latency = Math.round(Math.random() * LATENCY);
  await setTimeout(latency);
  return [...postList];
}

Load simulation

Then, we run autocannon to see how many requests the server can process.
On my machine, I get the following results (median requests by second):

tpl-stream	pug	ejs
1550	1632	670

conclusion

tpl-stream is more than capable and I will use it as my default template engine from now.