Benchmark: class with/without declared fields

Script Preparation code:

// classes declared here can't be accessed in test cases for some reason...

Tests:

class without declared fields
class X { constructor(foo, bar, baz) { this.foo = foo; this.bar = bar; this.baz = baz; } sum() { return this.foo + this.bar + this.baz; } } let i = 1000; let y = 0; while (i--) { let x = new X(1, 2, 3); y += x.foo + x.bar + x.baz; y += x.sum(); } return y;
class with declared fields
class X { foo; bar; baz; constructor(foo, bar, baz) { this.foo = foo; this.bar = bar; this.baz = baz; } sum() { return this.foo + this.bar + this.baz; } } let i = 1000; let y = 0; while (i--) { let x = new X(1, 2, 3); y += x.foo + x.bar + x.baz; y += x.sum(); } return y;

Rendered benchmark preparation results:

Previous results

Test case name	Result
class without declared fields
class with declared fields

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Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:122.0) Gecko/20100101 Firefox/122.0

Browser/OS: Firefox 122 on Mac OS X 10.15

Test name	Executions per second
class without declared fields	17663.1 Ops/sec
class with declared fields	5371.9 Ops/sec

class with/without declared fields (version: 0)