bench: add bench for fs.realpath() fix

The benchmarks included also work for the previous JS implementation of fs.realpath(). In case the new implementation of realpath() needs to be reverted, we want these changes to stick around. PR-URL: #7899 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]>

Author: trevnorris

benchmark/fs/bench-realpath.js

@@ -0,0 +1,46 @@
+'use strict';
+
+constcommon=require('../common');
+constfs=require('fs');
+constpath=require('path');
+constresolved_path=path.resolve(__dirname,'../../lib/');
+constrelative_path=path.relative(__dirname,'../../lib/');
+
+constbench=common.createBenchmark(main,{
+n: [1e4],
+type: ['relative','resolved'],
+});
+
+
+functionmain(conf){
+constn=conf.n>>>0;
+consttype=conf.type;
+
+bench.start();
+if(type==='relative')
+relativePath(n);
+elseif(type==='resolved')
+resolvedPath(n);
+else
+thrownewError('unknown "type": '+type);
+}
+
+functionrelativePath(n){
+(functionr(cntr){
+if(--cntr<=0)
+returnbench.end(n);
+fs.realpath(relative_path,function(){
+r(cntr);
+});
+}(n));
+}
+
+functionresolvedPath(n){
+(functionr(cntr){
+if(--cntr<=0)
+returnbench.end(n);
+fs.realpath(resolved_path,function(){
+r(cntr);
+});
+}(n));
+}

benchmark/fs/bench-realpathSync.js

@@ -0,0 +1,39 @@
+'use strict';
+
+constcommon=require('../common');
+constfs=require('fs');
+constpath=require('path');
+constresolved_path=path.resolve(__dirname,'../../lib/');
+constrelative_path=path.relative(__dirname,'../../lib/');
+
+constbench=common.createBenchmark(main,{
+n: [1e4],
+type: ['relative','resolved'],
+});
+
+
+functionmain(conf){
+constn=conf.n>>>0;
+consttype=conf.type;
+
+bench.start();
+if(type==='relative')
+relativePath(n);
+elseif(type==='resolved')
+resolvedPath(n);
+else
+thrownewError('unknown "type": '+type);
+bench.end(n);
+}
+
+functionrelativePath(n){
+for(vari=0;i<n;i++){
+fs.realpathSync(relative_path);
+}
+}
+
+functionresolvedPath(n){
+for(vari=0;i<n;i++){
+fs.realpathSync(resolved_path);
+}
+}