var target = ''
target += '1,'
target += '2,'
target += '3,'
target += '4,'
target += '5,'
target += '6,'
target += '7,'
target += '8,'
target += '9,'
target += '10,'
target += '11,'
target += '12,'
target += '13,'
target += '14,'
target += '15,'
target += '16,'
target += '17,'
target += '18,'
target += '19,'
target += '20,'
var target = []
target.push('1')
target.push('2')
target.push('3')
target.push('4')
target.push('5')
target.push('6')
target.push('7')
target.push('8')
target.push('9')
target.push('10')
target.push('11')
target.push('12')
target.push('13')
target.push('14')
target.push('15')
target.push('16')
target.push('17')
target.push('18')
target.push('19')
target.push('20')
target.join(',')
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
String concat | |
Array join |
Test name | Executions per second |
---|---|
String concat | 193232064.0 Ops/sec |
Array join | 1240013.6 Ops/sec |
Let's dive into the explanation of what's being tested in this benchmark, the options compared, their pros and cons, and other considerations.
What is being tested?
The provided JSON represents a JavaScript microbenchmark that compares two approaches to concatenate strings: using the +=
operator for string concatenation and generating an array with elements and joining them at the end using the join()
method.
Options compared
There are two test cases:
+=
operator to concatenate strings.join()
method.Pros and cons of each approach:
Other considerations:
Alternatives:
Other alternatives for string concatenation include:
template literals
(e.g., const result = '1' + '2' + '3';
): This approach is more concise but may have similar performance characteristics to +=
.Array.prototype.map()
and Array.prototype.join()
: Similar to the array join approach, this method creates an intermediate array and then joins its elements.However, it's worth noting that these alternatives might not be as straightforward or easy to implement as the simple +=
operator or the more complex array join approach.