performance.nodeTiming doesn't work as documented

[TimothyGu]

• Version: master
• Platform: all
• Subsystem: perf_hooks

'use strict';

const { performance } = require('perf_hooks');
console.log(performance.getEntries());

setTimeout(() => {
  console.log(performance.getEntries());
}, 1000);

prints

{ name: 'node',
  entryType: 'node',
  startTime: 134273200.382782,
  duration: 58.63538497686386,
  nodeStart: 134273200550404,
  v8Start: 134273201139625,
  bootstrapComplete: 0,
  environment: 134273205489261,
  loopStart: 0,
  loopExit: 0,
  thirdPartyMainStart: 0,
  thirdPartyMainEnd: 0,
  clusterSetupStart: 0,
  clusterSetupEnd: 0,
  moduleLoadStart: 134273255384838,
  moduleLoadEnd: 134273255401652,
  preloadModuleLoadStart: 134273255401823,
  preloadModuleLoadEnd: 134273255431580 }
{ name: 'node',
  entryType: 'node',
  startTime: 134273200.382782,
  duration: 1062.4414259791374,
  nodeStart: 134273200550404,
  v8Start: 134273201139625,
  bootstrapComplete: 134273262038325,
  environment: 134273205489261,
  loopStart: 134273262039729,
  loopExit: 0,
  thirdPartyMainStart: 0,
  thirdPartyMainEnd: 0,
  clusterSetupStart: 0,
  clusterSetupEnd: 0,
  moduleLoadStart: 134273255384838,
  moduleLoadEnd: 134273255401652,
  preloadModuleLoadStart: 134273255401823,
  preloadModuleLoadEnd: 134273255431580 }

1. startTime should be 0-based. performance.now() suffers an identical problem (performance.now() returns incorrect value #17892)
2. The Node.js-specific milestones have nanoseconds as units, while they should have milliseconds precision per docs.
3. The 0 special value ("the milestone has not been reached") is not documented, and may conflict with valid values after issues 1 and 2 are fixed.