Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
slice vs substr vs substring (remove first and last char)
(version: 0)
Compares slice, substr and substring to each other when removing first and last chars
Comparing performance of:
slice vs substr vs substring
Created:
6 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var example = '"there is no spoon"'
Tests:
slice
var result = example.slice(1,-1)
substr
var result = example.substr(1, example.length-1)
substring
var result = example.substring(1, example.length-1)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
slice
substr
substring
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 break down the benchmark and its options. **What is tested?** The provided JSON represents a JavaScript microbenchmark that tests three methods for removing the first and last characters from a string: `slice`, `substr`, and `substring`. The benchmark uses the `example` variable, which contains the string `"there is no spoon"`. **Options compared** The three options being compared are: 1. **Slice**: Uses the `slice()` method to create a new string with the first and last characters removed. 2. **Substr**: Uses the `substr()` method to create a substring starting from index 1 (the second character) up to, but not including, the end of the string minus one (i.e., removing only the first and last characters). 3. **Substring**: Uses the `substring()` method to create a substring starting from index 1 (the second character) up to, but not including, the specified length minus one (i.e., removing only the first and last characters). **Pros and cons of each approach** Here's a brief summary: * **Slice**: Creates a new string by specifying start and end indices. This method is efficient for creating a new string without modifying the original string. + Pros: Efficient, creates a new string + Cons: May incur additional memory allocation and copying * **Substr**: Creates a substring by specifying start and length indices. This method modifies the original string. + Pros: Modifies original string, can be faster for short substrings + Cons: Modifies original string, may not be suitable for all use cases * **Substring**: Similar to `substr`, but takes an optional second argument (the length of the substring) which is ignored in this benchmark. This method also modifies the original string. + Pros: Modifies original string, can be faster for short substrings + Cons: Modifies original string, may not be suitable for all use cases **Library** None. **Special JS feature or syntax** This benchmark does not use any special JavaScript features or syntax beyond the standard `slice()`, `substr()`, and `substring()` methods. **Other alternatives** In addition to these three methods, there are other ways to remove characters from a string in JavaScript: * Using `replace()` with a regular expression: `example.replace(/^.*\$.+$/, '')` * Using `replace()` with a regex pattern that matches the first and last characters: `example.replace(/^[^]+[^]+$/, '')` * Using a custom function or method to manipulate the string However, these alternatives are not included in this benchmark. Overall, this benchmark provides a simple and straightforward comparison of three common methods for removing characters from a string in JavaScript.
Related benchmarks:
slice vs substr vs substring with end
slice vs substring remove last char
slice vs substr vs substrings
slice vs substring (removing rightmost char)
Comments
Confirm delete:
Do you really want to delete benchmark?