Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
blackList vs regexp2
(version: 0)
Comparing performance of:
array search vs regexp
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var blackList = ["cazzo","madonna","stronzo","puttana","troia","porca","dio","porco","sticazzi"] var regexp = /^(cazzo|madonna|stronzo|puttana|troia|porca|dio|porco|sticazzi)$/
Tests:
array search
var result1 = blackList.indexOf("stronzo") >= -1; var result2 = blackList.indexOf("dio") >= -1; var result3 = blackList.indexOf("Marco") >= -1;
regexp
var result1 = "stronzo".match(regexp); var result2 = "dio".match(regexp); var result3 = "Marco".match(regexp);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
array search
regexp
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **Benchmark Definition JSON** The benchmark definition provided is for comparing two approaches: using a `blackList` array and using a regular expression (`regexp`) to match strings. * The `Script Preparation Code` defines two arrays: `blackList`, which contains a list of strings, and `regexp`, which is a regular expression that matches any of the strings in `blackList`. * The `Html Preparation Code` is empty, indicating that no HTML preparation is needed for this benchmark. * The `Benchmark Definition` provides two test cases: 1. "array search": This test case checks if certain strings are present in the `blackList` array using the `indexOf()` method. 2. "regexp": This test case checks if certain strings match the `regexp` pattern. **Options compared** The benchmark compares two approaches: * Using a `blackList` array with `indexOf()` * Using a regular expression (`regexp`) with the `match()` method **Pros and Cons of each approach:** 1. **Using a blackList array with indexOf():** * Pros: + Simple to understand and implement. + Fast lookup time for large arrays (O(n) on average). * Cons: + Requires iterating through the entire array, which can be slow for very large datasets. 2. **Using a regular expression (`regexp`) with match():** * Pros: + Can handle complex patterns and matching scenarios. + Often faster than `indexOf()` for small to medium-sized datasets (O(n) on average). * Cons: + More complex to understand and implement, especially for beginners. + May not be suitable for very large datasets due to the overhead of compiling the regular expression. **Library used:** None explicitly mentioned in the benchmark definition. However, `indexOf()` is a built-in JavaScript method that uses an array's internal data structure to perform the lookup. **Special JS feature or syntax:** None explicitly mentioned in the benchmark definition. However, it's worth noting that MeasureThat.net might use some internal optimization techniques or caching mechanisms for its benchmarks, which may not be immediately apparent from the code. **Other alternatives:** If you were considering alternative approaches to these two methods, here are a few options: * **Using a Set data structure:** A `Set` in JavaScript is a collection of unique values that can provide fast lookup times (O(1) on average). This approach might be more suitable for very large datasets. * **Using a Trie data structure:** A Trie (also known as a prefix tree) is a data structure that allows for efficient string matching. This approach might be more suitable for complex pattern matching scenarios. Keep in mind that these alternatives would require additional setup and may have different performance characteristics compared to the original benchmarked approaches. I hope this explanation helps you understand what's going on behind MeasureThat.net!
Related benchmarks:
Regex First Name split vs match - no console
blackList vs regexp
blackList vs regexp2 - expanded
includes + toLowerCase vs RegExp + i
Comments
Confirm delete:
Do you really want to delete benchmark?