var fn = () => {};
var TYPEOF_FN = "function";
typeof fn === "function"
typeof fn === TYPEOF_FN
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
raw | |
const |
Test name | Executions per second |
---|---|
raw | 810855168.0 Ops/sec |
const | 761873408.0 Ops/sec |
Measuring the performance of JavaScript benchmarks is crucial for understanding how different languages and browsers execute code.
The provided JSON represents a simple benchmark that tests two approaches to defining variables in JavaScript:
TYPEOF_FN
is defined as "function"
. The variable fn
is then declared with this value.const
keyword to declare a constant variable TYPEOF_FN
, which is also set to "function"
.Options Comparison
Both approaches have their pros and cons:
const
):Another consideration for this benchmark is the use of the typeof operator. The typeof
operator in JavaScript returns the type of its operand as a string. In this case, it's used to compare the value of fn
with "function"
. This approach allows us to test how different browsers and engines handle the typeof
operator.
Library and Special JS Features
There are no explicit libraries or special JS features used in this benchmark. However, it does rely on a few browser-specific features:
typeof
operator is available in most modern JavaScript environments.Other Alternatives
To test similar benchmarks, you could consider the following alternatives:
let
instead of var
: This would allow us to explore how different browsers and engines handle variable declarations with let
.fn
can be changed outside its scope.Keep in mind that benchmarking JavaScript code is a complex task and may require careful consideration of various factors to ensure accurate results.