How can I measure performance metrics in a Node.js application using Knex?

How can I measure performance metrics in a Node.js application using Knex?

You can measure performance metrics in a Node.js application using Knex by utilizing the built-in query event listeners. For example, you can listen to the 'query' event to log the time taken for each query.

Can you show me an example of how to implement that?

Sure! You can add an event listener like this:

knex.on('query', (queryData) => {
  const startTime = Date.now();
  console.log(`Query: ${queryData.sql}`);
  queryData.__knexQueryPromise.then(() => {
    const duration = Date.now() - startTime;
    console.log(`Query executed in ${duration}ms`);
  });
});

What other metrics should I consider for performance?

In addition to query execution time, consider measuring connection pool usage, error rates, and response times for your API endpoints.