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nsdosdosjfdoisjdf
(version: 0)
Comparing performance of:
map delete vs Alloc delete
Created:
9 years ago
by:
Guest
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Script Preparation code:
var map = new Map() var array2 = new Array(150) var del = false; for (var i = 0; i < 100; i ++) { var insert = Math.random(); map.set(i,insert) if (i == 50) del = insert; array2.push(insert) }
Tests:
map delete
map.delete(i)
Alloc delete
var ind = array2.indexOf(del) if (ind != -1) array2.splice(ind,50)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
map delete
Alloc delete
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into explaining the provided benchmark. **Benchmark Overview** The benchmark consists of two test cases: `map.delete(i)` and `var ind = array2.indexOf(del) if (ind != -1) array2.splice(ind,50)`. These tests are designed to measure the performance of JavaScript microbenchmarks, specifically focusing on map deletion and array manipulation. **Options Compared** The benchmark compares two approaches: 1. **Direct Map Deletion**: `map.delete(i)` This approach directly deletes an element from the map using the `delete` method. 2. **Indirect Map Deletion (Alloc Delete)**: `var ind = array2.indexOf(del) if (ind != -1) array2.splice(ind,50)` This approach uses the `indexOf` method to find the index of the deleted element in the array, and then uses `splice` to remove the element from the array. **Pros and Cons** ### Direct Map Deletion (`map.delete(i)`) Pros: * Simple and concise * Directly targets the specific key-value pair to delete Cons: * May involve additional overhead due to garbage collection or map resizing * May not be optimized for performance on modern JavaScript engines ### Indirect Map Deletion (Alloc Delete) (`var ind = array2.indexOf(del) if (ind != -1) array2.splice(ind,50)`) Pros: * Can avoid unnecessary overhead of direct deletion, such as garbage collection * Allows for more control over the removal process Cons: * More complex and verbose code * May involve additional overhead due to searching for the index in the array **Library and Purpose** The `Map` data structure is a built-in JavaScript object that stores key-value pairs. In this benchmark, the map is used to store random values, and the `delete` method is used to remove an element from the map. **Special JS Feature or Syntax** There is no specific special JS feature or syntax mentioned in the benchmark code. However, it's worth noting that the use of `Map` instead of traditional JavaScript objects provides a more efficient way to store and manipulate key-value pairs in modern browsers. **Other Alternatives** If you're interested in exploring alternative approaches, here are some options: * Using `delete` on an object with custom properties (e.g., `myObject[50] = insert; delete myObject[50];`) * Implementing a custom deletion algorithm using bitwise operations or other techniques * Comparing performance with other data structures like `Set` or `Array` Keep in mind that these alternatives may not provide significant performance improvements over the existing approaches and should be used as a starting point for further exploration.
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