console: lazy load cli

BridgeAR · MylesBorins · commit bc6dbc3bfc7c · 2018-05-22T14:13:28.000-04:00
PR-URL: #20567 Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
diff --git a/lib/console.js b/lib/console.js
@@ -31,7 +31,6 @@ const {
 } = require('internal/errors');
 const { previewMapIterator, previewSetIterator } = require('internal/v8');
 const { Buffer: { isBuffer } } = require('buffer');
-const cliTable = require('internal/cli_table');
 const util = require('util');
 const {
 isTypedArray, isSet, isMap, isSetIterator, isMapIterator,
@@ -49,6 +48,9 @@ const {
 from: ArrayFrom,
 } = Array;
 
+// Lazy loaded for startup performance.
+let cliTable;
+
 // Track amount of indentation required via `console.group()`.
 const kGroupIndent = Symbol('kGroupIndent');
 
@@ -325,6 +327,7 @@ Console.prototype.table = function(tabularData, properties) {
 (typeof tabularData !== 'object' && typeof tabularData !== 'function'))
 return this.log(tabularData);
 
+ if (cliTable === undefined) cliTable = require('internal/cli_table');
 const final = (k, v) => this.log(cliTable(k, v));
 
 const inspect = (v) => {

-Original file line number
+Diff line change
 }=require('internal/errors');
 const{ previewMapIterator, previewSetIterator }=require('internal/v8');
 const{Buffer: { isBuffer }}=require('buffer');
 -constcliTable=require('internal/cli_table');
 constutil=require('util');
 const{
  isTypedArray, isSet, isMap, isSetIterator, isMapIterator,
 from: ArrayFrom,
 }=Array;
 +// Lazy loaded for startup performance.
 +letcliTable;
++
 // Track amount of indentation required via `console.group()`.
 constkGroupIndent=Symbol('kGroupIndent');
 (typeoftabularData!=='object'&&typeoftabularData!=='function'))
 returnthis.log(tabularData);
 +if(cliTable===undefined)cliTable=require('internal/cli_table');
 constfinal=(k,v)=>this.log(cliTable(k,v));
 constinspect=(v)=>{