Benchmark: Concatenate string with '+' vs template literals vs String.concat() vs Array.join()

Script Preparation code:

var name = "name";
var id = "id";

Tests:

'+' operator
for (let i = 0; i < 80; ++i) { let result = id + ": 1, " + name + ": someItem"; }
Concat function
for (let i = 0; i < 80; ++i) { let result = "".concat(id, ": 1, ", name, ": someItem"); }
Template literal
for (let i = 0; i < 80; ++i) { let result = `${id}: 1, ${name}: someItem`; }
Join function
for (let i = 0; i < 80; ++i) { let result = [id, ": 1, ", name + ": someItem"].join(''); }

Rendered benchmark preparation results:

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Concatenate string with '+' vs template literals vs String.concat() vs Array.join() (version: 0)