jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

backquote vs manual concat (v35)

Revision 35 of this benchmark created on October 2, 2025

Setup

var a = 5, b= 10, c = 20;

Test runner

Ready to run.

Testing in
Test		Ops/sec
backquote	var r=`${a},${b},${c}`;	ready
manual concat	`var r=a+','+b+','+c;`	ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published by Craig Thompson on May 23, 2011
Revision 2: published on May 26, 2011
Revision 3: published on June 16, 2011
Revision 4: published on June 16, 2011
Revision 5: published on June 16, 2011
Revision 6: published on June 18, 2011
Revision 8: published on March 13, 2013
Revision 9: published on March 14, 2013
Revision 10: published on March 14, 2013
Revision 13: published on October 11, 2013
Revision 14: published on October 15, 2013
Revision 15: published on October 15, 2013
Revision 16: published on October 15, 2013
Revision 17: published on October 15, 2013
Revision 18: published on June 25, 2014
Revision 19: published on July 12, 2014
Revision 20: published on July 28, 2014
Revision 22: published on December 26, 2014
Revision 29: published on January 26, 2025
Revision 35: published on October 2, 2025