const g = { e: [] }g.o = function(x) { g.e.push([1,2,3]) }g.o()return g;let g = { e: [] }g.o = function(x) { g.e.push([1,2,3]) }g.o()return g;var g = { e: [] }g.o = function(x) { g.e.push([1,2,3]) }g.o()return g;--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| const | |
| let | |
| var |
| Test name | Executions per second |
|---|---|
| const | 79321864.0 Ops/sec |
| let | 20197994.0 Ops/sec |
| var | 21198694.0 Ops/sec |
I'd be happy to help explain the provided benchmark.
What is being tested?
The provided benchmark tests three different variable declarations in JavaScript: const, let, and var. Each test case uses a similar script that pushes an array of numbers onto a property of an object, and then returns the resulting object.
Options compared
The options being compared are:
const: A constant variable declaration, which means the value cannot be changed after it's declared.let: A let variable declaration, which allows the value to be changed after it's declared.var: A traditional variable declaration, which was used before let and const.Pros and Cons of each approach
const:let:let.var:let and const) and simpler syntax.Libraries used
None are mentioned in the provided benchmark definition or test cases. However, it's worth noting that some libraries might use different variable declarations or optimization techniques that could affect benchmark results.
Special JS features or syntax
There doesn't appear to be any special JavaScript features or syntax being tested in this benchmark. The focus is on the basic differences between const, let, and var.
Other alternatives
If you're interested in exploring other options, consider:
Keep in mind that these alternatives might not directly relate to the specific benchmark being discussed.
