var n = 0;
while(true) {
n++;
if(n==100000)
break;
}
var n = 0;
while(true) {
n++;
if(n===100000)
break;
}
var n = 0;
while(true) {
n++;
if(n=='100000')
break;
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
test equality | |
test strict equality | |
string to int |
Test name | Executions per second |
---|---|
test equality | 6300.4 Ops/sec |
test strict equality | 6294.4 Ops/sec |
string to int | 881.4 Ops/sec |
This benchmark investigates the performance difference between using the loose equality operator (==
) and the strict equality operator (===
) in JavaScript.
Here's a breakdown:
Test Cases:
test equality
: Compares an integer with another integer using ==
. test strict equality
: Does the same comparison but uses ===
, which checks both value and data type.string to int
: Compares an integer to a string representation of the same number ('100000'
), highlighting the potential for unexpected behavior with loose comparison.Options Compared:
==
(loose equality) and ===
(strict equality). Loose equality performs type coercion, meaning it might convert values to a common type before comparison. Strict equality demands both value and type match.Pros and Cons:
==
: ===
: Key Considerations:
Readability and Maintainability: ===
generally improves code readability because its behavior is clearer and less prone to surprises.
Potential Performance Impact: While the performance difference between ==
and ===
is usually negligible, it's worth considering in scenarios where performance is critical. In most cases, the benefits of using ===
outweigh any minor performance differences.
Alternatives:
The benchmark doesn't explore alternatives, but depending on the specific use case, you might consider:
Let me know if you have any other questions!