String.prototype.replaceAll1 = function(search, replacement) {
var target = this;
return target.replace(new RegExp(search, 'g'), replacement);
};
String.prototype.replaceAll2 = function(search, replacement) {
var target = this;
return target.replaceAll(search, replacement);
};
"this is it".replace(/ /g, "+");
"this is it".replaceAll(" ", "+");
"this is it".split(" ").join("+");
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
replace regrex | |
replace all | |
split join |
Test name | Executions per second |
---|---|
replace regrex | 3246578.8 Ops/sec |
replace all | 7195226.0 Ops/sec |
split join | 3665524.2 Ops/sec |
Overview
MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided JSON represents a benchmark definition, which includes the test cases to be measured. In this explanation, we'll break down what's being tested, compare different approaches, discuss pros and cons, and explore any special features or syntax used.
Benchmark Definition
The benchmark definition includes three main components:
replaceAll1
and replaceAll2
. These methods are intended to replace all occurrences of a search pattern (/ /g
) with a replacement string ("+"
). The difference between these two implementations lies in the way they handle the replacement.These test cases aim to measure the performance of different string replacement methods.
Options Compared
The main options being compared are:
replaceAll
(with a single parameter) vs. replaceAll1
and replaceAll2
(with two parameters)./ /g
) vs. non-regular expression (" "
).Pros and Cons of Different Approaches
Here's a brief analysis of each approach:
" "
) is faster and more lightweight, but limited to basic replacement logic.Special Features or Syntax
In this benchmark, the following special features are used:
/ /g
pattern is used in the replaceAll1
method. Regular expressions provide a powerful way to match patterns in strings.Other Alternatives
If you're interested in exploring alternative string replacement methods, consider the following:
replaceAll1
and replaceAll2
, but uses a different implementation.In conclusion, MeasureThat.net's benchmark definition provides a simple yet effective way to measure JavaScript performance for common string replacement tasks. By understanding the options being compared and their pros and cons, developers can choose the best approach for their specific use cases.