Benchmark: string concat speed

Script Preparation code:

var s;

Tests:

plus
s = Math.random() + "a"+" b" + " " + "cdefgh " + "test" + " "+"123";
join
s = [Math.random(), "a","b","cdefgh","test","123"].join(" ");
fn
function join(){ var s; for(var i=0, len=arguments.length;i<len;i++){ s += arguments[i] + " "; } return s; } join(Math.random(),"a","b","cdefgh","test","123");
spacer
function spacer(s){ return s+" "; } s = spacer(Math.random())+spacer("a")+spacer("b")+spacer("cdefgh")+spacer("test")+"123";

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36

Browser/OS: Chrome 55 on Mac OS X 10.9.5

string concat speed (version: 0)