object pool in JavaScript

What this snippet does

Object pools avoid repeated allocation and GC — acquire a pre-made object, use it, then release it back for reuse.

Expected output

1
2

Why practise typing this

Typing performance code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

More JavaScript practice

• lazy propertiesPerformance · advanced
• closure leaksPerformance · advanced
• let vs constVariables · beginner
• const configVariables · beginner
• const mutationVariables · beginner
• var hoistingVariables · beginner