PERFLOG

A simple performance logger. No external library. Not tested in production. It can be used for debugging and development environment.

Syntax

// declarion
     const perf = require("perflog")();
//mark
     perf("apiCall");

Usage examples

Print log in the console:

    // initialize 
    const perf = require("perflog")();

    // mark the point
    perf("apiCall");
    const response = await axios.get();
    // mark again. so between this two perf() calls it logs the time in the console
    perf("apiCall");

If you dont wish to log into the console,

     // initialize 
        const perf = require("perflog")({inLineLog:false});

        // mark the point
        perf("apiCall");
        const response = await axios.get();
        // mark again.
        perf("apiCall");

Now console logs wont be there. To get the performance details. The way is using perf._summary

    console.log(perf._summary);

To get all the performance logs :

    perf("apiCall");
    const response = await axios.get();
    // mark again. so between this two perf() calls it logs the time in the console
    perf("apiCall");

    perf("db");
    await db.create(data);
    perf("db");

    const summary = perf._summary;
    console.log(summary);

Output:

    {
      "apiCall": "1160.50",
      "db": "1113.13"
    }

Options:

    const perf = require("perflog")({
        enabled:true,
        inLineLog:true, 
        round:2,
        logPrefix:"PERF:"
    });

Environment configuration

PERF_LOG :

If PERF_LOG is set to false, all the logging will be disabled. No in line logging and no logging report in perf._summary object.