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js split vs substring ticker
(version: 0)
Comparing performance of:
split vs substring
Created:
4 years ago
by:
Guest
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Script Preparation code:
s = "/USDT:BTC/USDT"
Tests:
split
s.split(":")[1]
substring
s.substring(s.indexOf(":")+1, s.length)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
split
substring
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmark and its options. **Benchmark Overview** The provided benchmark is designed to measure the performance difference between two approaches: splitting a string using `split()` method and extracting a substring using `substring()` method. **Options Compared** Two options are compared: 1. **`s.split("\":")[1]`**: This option splits the input string `s` at the character `\:` ( colon ) and extracts the second part of the resulting array, which contains the ticker symbol. 2. **`s.substring(s.indexOf("\":")+1, s.length)`**: This option finds the index of the character `\:` in the input string `s`, adds 1 to it (to skip the colon), and then extracts a substring from that index to the end of the string. **Pros and Cons** * **`split()` method**: + Pros: Fast, efficient, and widely supported. It returns an array of substrings. + Cons: May create intermediate arrays, which can lead to memory allocation issues for very large inputs. * **`substring()` method**: + Pros: Can be more efficient than `split()` because it only extracts a specific substring without creating intermediate arrays. + Cons: Requires finding the index of the character `\:` in the input string first, which may be slower than `split()`. **Library and Special JS Feature** There is no explicit mention of a library used in this benchmark. However, if we assume that the input string `s` contains a colon (:) separated ticker symbol (e.g., "USDT:BTC/USDT"), it's likely that the `split()` method relies on JavaScript's built-in implementation to split the string. **Other Considerations** * **String Length and Complexity**: The benchmark assumes that the input string `s` is long enough to contain multiple substrings separated by colons. If the input strings are shorter or have a different format, the performance difference between these two approaches may be less noticeable. * **Browser and Device Variability**: The benchmark results show different execution rates for Chrome 97 on Linux Desktop. This highlights the importance of considering browser and device variability when optimizing JavaScript code. **Alternatives** If you were to rewrite this benchmark or implement similar benchmarks, consider using more modern string manipulation APIs like `String.prototype.split()` with a regular expression or `Intl.StringFormat` (for internationalized strings). Additionally, you might want to explore other optimization techniques, such as: * Using `String.prototype.indexOf()` and then `String.prototype.substring()` for better performance. * Leveraging the `WebAssembly` JavaScript engine for improved performance on specific platforms. * Considering the use of a Just-In-Time (JIT) compiler like V8 or SpiderMonkey for optimized execution. Keep in mind that these alternatives may require adjustments to your benchmarking strategy and testing protocols.
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