var tgt = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20'
tgt.split(',').length
var total = 7
total +=1
total +=1
total +=1
total +=1
total +=1
total +=1
total +=1
total +=1
total +=5
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Split | |
Number increase |
Test name | Executions per second |
---|---|
Split | 3212882.0 Ops/sec |
Number increase | 475904128.0 Ops/sec |
Let's break down the provided benchmark and explain what is being tested, the options compared, pros and cons of each approach, and other considerations.
Benchmark Definition
The benchmark definition is empty, which means that the test cases are defined elsewhere in the code. The script preparation code and HTML preparation code fields are also empty, indicating that these steps don't need to be executed for the benchmark.
Individual Test Cases
There are two test cases:
**"Split"** This test case measures the performance of the
split()method on a string with multiple comma-separated values. The benchmark definition is:
var tgt = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20'\r\ntgt.split(',').lengthThis code creates a string with 20 comma-separated values and then splits it into an array using the
split()` method. The length of the resulting array is measured.
**"Number increase"** This test case measures the performance of incrementing a variable
totalby 1 multiple times. The benchmark definition is:
var total = 7\r\ntotal +=1\r\ntotal +=1\r\ntotal +=1\r\ntotal +=1\r\ntotal +=1\r\ntotal +=1\r\ntotal +=1\r\ntotal +=1\r\ntotal +=5This code initializes a variable
total` to 7 and then increments it by 1, 19 times.
Comparison of Options
The benchmark compares the performance of two approaches:
**: This approach uses the
split()` method to split the string into an array.**: This approach uses direct incrementation of the variable
total`.Pros and Cons:
Library Used
There is no explicit library used in these benchmark definitions. However, the split()
method is a built-in JavaScript method that splits a string into an array.
Special JS Feature/Syntax
The only special feature used here is the use of the \r
escape sequence to create a newline character. This is specific to Windows-style line endings and may not be compatible with all platforms.
Other Alternatives
If you wanted to measure the performance of these operations, you could also consider using other approaches:
new Array(20).fill(0)
).tgt.match(/,/g).length
).Keep in mind that these alternatives may have their own set of trade-offs and may not be suitable for all use cases.