var data = {
id: 1,
a: 1,
b: '',
c: '',
d: false,
e: '',
f: 1,
g: {
h: 1,
i: 'Dannag'
},
k: 1,
l: 1,
}
let result = 0;
for (const property in data) {
if (typeof data[property] === 'number' && Number.isInteger(data[property])) {
result += data[property];
}
}
let result = 0;
for (const property in data) {
const value = data[property];
if (typeof value === 'number' && Number.isInteger(value)) {
result += value;
}
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Property access | |
Pointer |
Test name | Executions per second |
---|---|
Property access | 527483.3 Ops/sec |
Pointer | 805046.2 Ops/sec |
Let's dive into the world of JavaScript microbenchmarks.
Benchmark Description
The provided JSON represents a benchmark test case named "Object property access or saved pointer". This benchmark compares two approaches to accessing object properties in JavaScript:
for...in
loop to iterate over the object's properties and checks if each value is an integer using Number.isInteger()
.value
) to store the current property value, which is then checked for being an integer.Options Compared
The two approaches are compared in terms of performance, with the goal of determining which one is faster and more efficient.
Pros and Cons
Library/Features Used
In the benchmark definition JSON, no specific JavaScript library or feature is used. However, some features of modern JavaScript are implied:
for...in
loop: a built-in JavaScript construct for iterating over object propertiesNumber.isInteger()
: a built-in JavaScript method for checking if a value is an integerOther Considerations
When writing performance-critical code, it's essential to consider the following factors:
Alternatives
If you're interested in exploring other JavaScript benchmarking options, consider:
Remember, when it comes to performance optimization, understanding the underlying mechanics and trade-offs is crucial.