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Run results for: join vs string + trim vs filter + join

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36 OPR/84.0.4316.21
Opera 84
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
join 2562171.5 Ops/sec
string + trim 3419861.2 Ops/sec
filter + joint 1983404.8 Ops/sec
Script Preparation code:
AخA
 
var A = null;
var B = 'test';
Tests:

  • join

     
    var result = [A | '' , B | ''].join(' ');

  • string + trim

     
    var result = `${A | ''} ${B | ''}`.trim();

  • filter + joint

     
    var result = [A, B].filter(Boolean).join(' ');