Created
March 27, 2019 07:56
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Measuring performance (spead vs Array.forEach)
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| <html> | |
| <head> | |
| <title>JS Sandbox</title> | |
| </head> | |
| <body> | |
| <script> | |
| const object = { | |
| test: "test", | |
| paul: "paul", | |
| morning: { test: "test", paul: "paul" } | |
| }; | |
| let test1 = { test: "default" }; | |
| const t0 = performance.now(); | |
| Object.keys(object).forEach(item => { | |
| test1[item] = object[item]; | |
| }); | |
| const t1 = performance.now(); | |
| console.log("Call to forEach took " + (t1 - t0) + " milliseconds."); | |
| let test2 = { test: "default" }; | |
| const t2 = performance.now(); | |
| test2 = { ...test2, ...object }; | |
| const t3 = performance.now(); | |
| console.log("Call to spread took " + (t3 - t2) + " milliseconds."); | |
| </script> | |
| </body> | |
| </html> |
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Spread seems to be faster in my checks: