var p = 'The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?The quick brown fox jumps over the lazy dog. If the dog reacted, was it really lazy?';p.replaceAll('dog', 'monkey');p.split('dog').join('monkey');--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| String.replaceAll | |
| split and join |
| Test name | Executions per second |
|---|---|
| String.replaceAll | 255044.1 Ops/sec |
| split and join | 893894.2 Ops/sec |
Let's break down the benchmark and explain what's being tested.
Benchmark Definition
The benchmark definition represents a JavaScript function that performs a string replacement operation on a given string p. The function takes two arguments: the string to replace ('dog') and the replacement value ('monkey').
Options Compared
There are two options being compared in this benchmark:
replaceAll method: This is a built-in JavaScript method that replaces all occurrences of a substring with another substring.split and join methods: These methods split the string into an array of substrings using the specified delimiter ('dog') and then join the array back into a single string, replacing each occurrence of 'dog' with 'monkey'.Pros and Cons
replaceAll method:split and join methods:replaceAll method for simple cases.Library
There is no specific library being used in this benchmark, other than JavaScript's built-in string manipulation functions.
Special JS Feature or Syntax
The benchmark does not use any special JavaScript features or syntax that would require additional explanation. The focus is on comparing the performance of two basic string replacement methods.
Alternative Approaches
Other approaches to achieve string replacement could include:
String.prototype.replace()replace() functionHowever, these alternatives are not being tested in this specific benchmark.
Benchmark Preparation Code
The script preparation code is a string that contains multiple instances of the phrase "The quick brown fox jumps over the lazy dog." This serves as the input string p for the benchmark. The html preparation code is empty, which suggests that no HTML-specific modifications are required for this benchmark.
Overall, this benchmark provides a simple yet representative comparison between two basic JavaScript methods for performing string replacement operations.
