Measured : Which programming language is fastest?

My question is if anyone here has any experience with simplistic benchmarking and could tell me which things to test for in order to get a simple idea of each language's general performance?

Time to Solve TTS. Is that lowest Elapsed Time or lowest CPU Time or mean CPU Time? (How many samples per program?) Optimized, Un-optimized or Goldilocks programs. Are the measurements reliable?

There's more than one right answer —

Answer for a few un-optimised fannkuch-redux programs —

Un-optimised single-thread #8 programs transliterated line-by-line literal style into different programming languages from the same original.

	source code	secs	mem	gz
	C gcc #8	39.34	2,343	483
	Java #8	44.98	60,264	517
	Node.js #8	58.20	63,136	452
	PHP #8	28 min	16,335	477
	Ruby yjit #8	34 min	17,691	418
	Python 3 #8	40 min	11,874	414

Or choose your answer for Rust and Julia and Haskell and … crowd sourced fannkuch-redux programs.

Answer for the fastest 200 contributed programs —

Eight simple tasks. A couple of dozen different programming languages. Altogether about 200 programs that are faster than the other crowd-sourced same-language-implementation programs.

Explore the measurements with box plot charts — medians, dispersion, skew.

The median-line for some language implementation groups seems to fall outside the IQR box for other groups. Choose your answer for likely differences between the groups.