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str.match vs 2x str.Split
(version: 0)
Test String.match with regex against double String.split with string. Extracting a YT video id from href.
Comparing performance of:
String.split 2x vs Regex.match vs String.split 1st half vs String.split 2nd half
Created:
3 years ago
by:
Guest
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Script Preparation code:
string = "https://www.youtube.com/watch?v=6ohiKio2Sfw&list=PL1CA6335E0D3699B6"; regex = /(?:v=)([a-zA-Z0-9-_]+)/;
Tests:
String.split 2x
string.split('v=')[1].split('&')[0]
Regex.match
string.match(regex)[1]
String.split 1st half
string.split('v=')[1]
String.split 2nd half
string.split('&')[0]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
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Test case name
Result
String.split 2x
Regex.match
String.split 1st half
String.split 2nd half
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview** The provided JSON represents a JavaScript microbenchmark test case on the MeasureThat.net website. The test compares different approaches for extracting a YouTube video ID from an href string using both `String.split` and regular expressions. **Benchmark Definition** The benchmark definition outlines two main scenarios: 1. **Double String Split**: Extracts the second part of the string split at 'v='. 2. **Regex Match**: Uses a regular expression to match and extract the first group of the matched string. These scenarios are further divided into three sub-scenarios for each approach: * Double String Split: + `String.split 1st half`: Splits the string up to the 'v=' part. + `String.split 2nd half`: Splits the string from the 'v=' part onwards. + `String.split 2x`: Calls `split` twice, first on 'v=', then on '&', to extract the video ID. * Regex Match: + `Regex.match`: Uses a regular expression to match and extract the first group of the matched string. **Options Comparison** The two main approaches have different pros and cons: 1. **Double String Split**: * Pros: Simple, intuitive, and well-supported by most browsers. * Cons: May not work correctly for all input formats (e.g., URLs with multiple '&' characters). 2. **Regex Match**: + Pros: More flexible and efficient than string splitting, especially for complex patterns. + Cons: Requires a good understanding of regular expressions, can be slower due to compilation overhead, and may not work as expected in older browsers. **Library** In the provided JSON, no explicit library is mentioned. However, the `String.prototype.split()` method is part of the built-in JavaScript String prototype, which is used by all modern browsers. **Special JS Features or Syntax** There are no specific JavaScript features or syntax mentioned in this benchmark definition.
Related benchmarks:
split vs regex onurl
Very simple regex vs string split
str.match vs str.Split (regex)
str.match / str.split
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