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js.indexof.speed.text
(version: 0)
comparing large vs small search strings with indexOf function
Comparing performance of:
small.string vs larger.string
Created:
3 years ago
by:
Guest
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Script Preparation code:
var text = "REG HKLM\Software\MyCo /v Path /t REG_EXPAND_SZ /d ^%systemroot^% REG hklm \\ABC\HKLM\Software\Microsoft\ResKit\Nt\Setup /s";
Tests:
small.string
var fst = text.indexOf("%systemroot");
larger.string
var scnd = text.indexOf("REG_EXPAND_SZ /d ^%systemroot^% REG hklm \\ABC");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
small.string
larger.string
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the provided JSON and explain the options, pros, cons, and other considerations. **Benchmark Overview** The benchmark is designed to compare the performance of JavaScript's `indexOf` function on different search strings, specifically focusing on large versus small strings. The test cases are: 1. "small.string": Searching for a short string within a longer text. 2. "larger.string": Searching for a longer string within a shorter text. **Options Compared** The benchmark is comparing two approaches: 1. **Small String**: Searching for a short string (`"REG HKLM\\Software\\MyCo /v Path /t REG_EXPAND_SZ /d ^%systemroot^% REG hklm \\\\ABC\\HKLM\\Software\\Microsoft\\ResKit\\Nt\\Setup /s"`). 2. **Larger String**: Searching for a longer string (`"REG_EXPAND_SZ /d ^%systemroot^% REG hklm \\\\ABC\\HKLM\\Software\\Microsoft\\ResKit\\Nt\\Setup /s"`). **Pros and Cons** * **Small String**: + Pros: May be more suitable for applications where short strings are common. + Cons: Could lead to slower performance if the search string is often small, as the browser might not optimize for it. * **Larger String**: + Pros: May be more suitable for applications where longer strings are common. + Cons: Could lead to slower performance if the search string is often large, as the browser might not optimize for it. Other considerations: * **String Preprocessing**: The benchmark uses a specific string (`text`) which is preprocessed before running the `indexOf` function. This preprocessing step might affect the results and should be considered when interpreting the benchmark. * **Browser Behavior**: The benchmark runs on different browsers (in this case, only Firefox 105). Browser behavior can vary significantly, so it's essential to consider multiple browser results when interpreting the benchmark. **Library Used** There is no explicit library used in the provided benchmark. However, the `indexOf` function is a built-in JavaScript method that searches for an index of a specified value within a string. **Special JS Feature or Syntax** None are explicitly mentioned in the provided code snippet. **Other Alternatives** If you're looking for alternatives to this benchmark, consider the following: * **Benchmarking Frameworks**: Tools like Benchmark.js, jsperf, or testling provide more extensive benchmarking capabilities and might be suitable for comparing different JavaScript optimizations. * **String Search Algorithms**: Implementing custom string search algorithms, such as Rabin-Karp or Knuth-Morris-Pratt, could provide more detailed insights into the performance of `indexOf` compared to alternative algorithms. Keep in mind that this benchmark is designed to compare specific scenarios and might not be representative of all use cases. Always consider multiple perspectives and benchmarking frameworks when evaluating JavaScript performance.
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