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Public vs Private properties
Comparing the get and set performance of directly accessing a field on a class versus using a getter/setter pair on a private property.
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<iframe src="https://measurethat.net/Embed?id=578432" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
proxied set
206.5M/s
direct set
193.4M/s
Direct get
15.0M/s
proxied get
14.9M/s
View exact numbers
Test name
Executions per second
✓
proxied set
206,474,560 Ops/sec
direct set
193,386,928 Ops/sec
Direct get
14,953,725 Ops/sec
proxied get
14,913,985 Ops/sec
Script Preparation code:
class Test { get bar() { return this.#bar }; set bar(v) { this.#bar = v }; foo = 1; #bar = 1; } var test = new Test; var x;
Tests:
Direct get
x = test.foo;
proxied get
x = test.bar
direct set
test.foo = 2;
proxied set
test.bar = 2;