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split vs split vs split vs slice+indexOf
(version: 0)
Comparing performance of:
split1 vs split10 vs split0 vs slice
Created:
4 years ago
by:
Guest
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Script Preparation code:
var a = "slkfzesqdmkfbaczeiuncamzieurnamziuenramcizurnmcaizunermdzdezedzdjg qmzzpeoriucbyazpoeruycbaozecyrbazdzedksjdf zedazerbcazoyrbcoaizuyebrcoizedzmkqjsd fzedzedzedzedmkj";
Tests:
split1
a.split(" ", 1);
split10
a.split(" ", 1)[0];
split0
a.split(" ")[0];
slice
a.slice(0, a.indexOf(" "));
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
split1
split10
split0
slice
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's dive into the benchmark definition. **What is being tested?** The test case is comparing the performance of four different methods to extract the first substring in a long string that contains multiple spaces. **Options compared:** 1. `a.split(" ", 1);` - This method splits the string `a` by a single space into an array, and returns the first element of the array. 2. `a.split(" ", 1)[0];` - Similar to option 1, but with an additional indexing step `[0]` to access the first element of the array. 3. `a.split(" ")[0];` - This method splits the string `a` by any number of spaces into an array, and returns the first element of the array. 4. `a.slice(0, a.indexOf(" "));` - This method uses the `slice()` method to extract a substring from index 0 to the index of the first space (found using the `indexOf()` method). **Pros/Cons:** * **split() with limit**: Option 1 is efficient because it splits the string only up to the first space, reducing unnecessary processing. However, it may not work correctly if there are no spaces in the string. * **split() without limit**: Options 2 and 3 split the entire string by any number of spaces, which can be slower due to excessive splitting and indexing operations. Option 3 is slightly faster than option 2 since it doesn't need an additional indexing step. * **slice() with indexOf()**: Option 4 uses `indexOf()` to find the first space, and then `slice()` to extract the substring up to that point. This approach may be slower than using `split()` since it involves two separate operations. **Other considerations:** * The test string is very long, containing multiple spaces. This might skew the results if the tested methods have different performance characteristics for short vs. long strings. * The test environment (Android 4.2.2 on a tablet) may not be representative of other platforms or devices. No special libraries or JavaScript features are used in this test case.
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