Benchmark: count number of chars in a string

Tests:

regex
("this is foo bar".match(/o/g)||[]).length
split
"this is foo bar".split("o").length-1
for loop1
var stringsearch = "o"; var str = "this is foo bar"; for(var count=-1,index=-2; index != -1; count++,index=str.indexOf(stringsearch,index+1) );
for loop 2
var stringsearch = "o"; var str = "this is foo bar"; for(var i=count=0; i<str.length; count+=+(stringsearch===str[i++]));
deleting
var str = "this is foo bar"; str.length - str.replace(/o/g,'').length;
histogram
var str = "this is foo bar"; var schar = 'o'; var hist={}; for(si in str){ hist[str[si]] = hist[str[si]] ? 1+hist[str[si]]:1; }

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36

Browser/OS: Chrome 79 on Linux

count number of chars in a string (version: 0)