util: improve inspect's customInspect performance

This improves the performance to copy user options that are then
passed through to the custom inspect function.
The performance improvement depends on the complexity of the custom
inspect function. For very basic cases this is 100% faster than
before.
PR-URL: #30659
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>

Author: BridgeAR

lib/internal/util/inspect.js

@@ -119,6 +119,8 @@ const builtInObjects = new Set(
 ObjectGetOwnPropertyNames(global).filter((e)=>/^([A-Z][a-z]+)+$/.test(e))
 );
 
+// These options must stay in sync with `getUserOptions`. So if any option will
+// be added or removed, `getUserOptions` must also be updated accordingly.
 constinspectDefaultOptions=ObjectSeal({
 showHidden: false,
 depth: 2,
@@ -174,13 +176,20 @@ const meta = [
 ];
 
 functiongetUserOptions(ctx){
-constobj={stylize: ctx.stylize};
-for(constkeyofObjectKeys(inspectDefaultOptions)){
-obj[key]=ctx[key];
-}
-if(ctx.userOptions===undefined)
-returnobj;
-return{ ...obj, ...ctx.userOptions};
+return{
+stylize: ctx.stylize,
+showHidden: ctx.showHidden,
+depth: ctx.depth,
+colors: ctx.colors,
+customInspect: ctx.customInspect,
+showProxy: ctx.showProxy,
+maxArrayLength: ctx.maxArrayLength,
+breakLength: ctx.breakLength,
+compact: ctx.compact,
+sorted: ctx.sorted,
+getters: ctx.getters,
+ ...ctx.userOptions
+};
 }
 
 /**

test/parallel/test-util-inspect.js

@@ -883,6 +883,10 @@ util.inspect({ hasOwnProperty: null });
 assert.strictEqual(opts.budget,undefined);
 assert.strictEqual(opts.indentationLvl,undefined);
 assert.strictEqual(opts.showHidden,false);
+assert.deepStrictEqual(
+newSet(Object.keys(util.inspect.defaultOptions).concat(['stylize'])),
+newSet(Object.keys(opts))
+);
 opts.showHidden=true;
 return{[util.inspect.custom]: common.mustCall((depth,opts2)=>{
 assert.deepStrictEqual(clone,opts2);
@@ -909,10 +913,11 @@ util.inspect({ hasOwnProperty: null });
 }
 
 {
-constsubject={[util.inspect.custom]: common.mustCall((depth)=>{
+constsubject={[util.inspect.custom]: common.mustCall((depth,opts)=>{
 assert.strictEqual(depth,null);
+assert.strictEqual(opts.compact,true);
 })};
-util.inspect(subject,{depth: null});
+util.inspect(subject,{depth: null,compact: true});
 }
 
 {