async time check util to find out what's slowing down a node function. I should probably use the node debugger instead.

asyncTimeCheck.ts

const asyncTime = async (
  cb: (timecheck: (msg: string) => void) => Promise<any>,
) => {
  let prevTime: number;
  let nowTime: number;
  let prevStepName: string;

  const timecheck = (stepName: string) => {
    if (!prevStepName) {
      console.log('\x1b[36m%s\x1b[0m', `first step: ${stepName}`);
      prevTime = Date.now();
      prevStepName = stepName;
      return;
    }

    nowTime = Date.now();
    console.log(
      '\x1b[36m%s\x1b[0m',
      `from ${prevStepName} to ${stepName}: ${nowTime - prevTime}ms`,
    );

    prevTime = nowTime;
    prevStepName = stepName;
  };

  return cb(timecheck);
};

/**
Use this something like this:

const myFunction = async () => {
  return asyncTimeCheck(async timecheck => {
    timecheck('step 1');
    
    // something to benchmark here
    
    timecheck('step 2');
    
    // something else to benchmark here
    
    timecheck('step 3');
    
    // something else
    
    timecheck('step 4');
    
    return x;
  });
}
 */