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Javascript Map.set undefined vs Map.delete
(version: 0)
Comparing performance of:
Map.set undefined vs Map.delete
Created:
5 years ago
by:
Guest
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Tests:
Map.set undefined
const rs = 1000000; const testMap = new Map(); for (let i = 0; i < rs; i++) { testMap.set("i" + i, i); } for(let i = 0; i < rs; i++) { testMap.set("i"+i, undefined); }
Map.delete
const rs = 1000000; const testMap = new Map(); for (let i = 0; i < rs; i++) { testMap.set("i" + i, i); } for(let i = 0; i < rs; i++) { testMap.delete("i"+1); }
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Suite status:
<idle, ready to run>
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Test case name
Result
Map.set undefined
Map.delete
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases. **What is being tested?** The primary goal of this benchmark is to compare the performance of two different approaches when setting (adding) or deleting elements from a `Map` object in JavaScript. Specifically, the tests measure: 1. The time taken to set `undefined` values into an existing map (`Map.set undefined`). 2. The time taken to delete keys from an existing map (`Map.delete`). **Options compared:** The benchmark compares two options for setting values in a `Map`, which are: A) Setting `undefined` directly: This approach involves assigning the value `undefined` to a key in the map. B) Deleting a key with a non-existent value: This approach involves using the `delete` method on the map, but providing an existing key that does not have a corresponding value. **Pros and Cons of each approach:** A) Setting `undefined` directly: Pros: * This approach is more straightforward and intuitive. * It's often used in common JavaScript scenarios. Cons: * When `undefined` is set as a value, it can lead to unexpected behavior or errors if not handled properly. * In some cases, this might cause the map to grow indefinitely, leading to performance issues. B) Deleting a key with a non-existent value: Pros: * This approach does not add values to the map; instead, it removes existing keys. * It's often used in optimization scenarios where removing keys is more efficient than adding new ones. Cons: * This approach can be less intuitive and might require additional bookkeeping or logic to ensure correct behavior. * In some cases, this might lead to performance issues if not implemented correctly. **Library usage:** The benchmark uses the built-in `Map` object in JavaScript, which is a data structure that stores mappings of unique keys to values. The `Set` method is used for setting values, and the `delete` method is used for deleting keys. **Special JS feature or syntax:** There are no special features or syntaxes used in this benchmark beyond standard JavaScript and its built-in `Map` object. **Other alternatives:** Other alternatives to testing performance of map operations might include: 1. Using a different data structure, such as an array with objects or a custom implementation. 2. Measuring the performance of other common JavaScript operations, such as iteration or sorting algorithms. 3. Comparing the performance of different programming languages or runtime environments. These alternatives would provide a more comprehensive understanding of the performance characteristics of various JavaScript operations and data structures.
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delete operator VS Map.delete
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