Benchmark: Conditional Map clearing

Script Preparation code:

const obj = {};
const obk = {};
const obi = {};
const arr = [
  [obj, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [obk, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [obi, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
  [{}, 1],
];
var map1 = new Map(arr);
var map2 = new Map();

Tests:

clear
map1.clear(); map2.clear();
conditional clear
if (map1.size > 0) { map1.clear(); } if (map2.size > 0) { map2.clear(); }
loose conditional clear
if (map1.size) { map1.clear(); } if (map2.size) { map2.clear(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
clear
conditional clear
loose conditional clear

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is designed to measure the performance of clearing a `Map` object in JavaScript, specifically comparing three different approaches:

1. **Clearing without conditions**: `map1.clear(); map2.clear();`
2. **Conditional clearing with explicit checks**: `if (map1.size > 0) { map1.clear(); } if (map2.size > 0) { map2.clear(); }`
3. **Loose conditional clearing**: `if (map1.size) { map1.clear(); } if (map2.size) { map2.clear(); }`

**Options Compared**

The benchmark is comparing the performance of these three approaches:

*   Clearing without conditions: This approach always clears both maps, regardless of their size.
*   Conditional clearing with explicit checks: This approach only clears a map if it has at least one entry (i.e., `size > 0`). It requires an explicit check before clearing the map.
*   Loose conditional clearing: This approach also only clears a map if it has at least one entry, but uses a more relaxed syntax (`if (map1.size)`) and doesn't require an explicit check.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

*   **Clearing without conditions**: Pros: Simple and easy to read; Cons: May clear unnecessary entries.
*   **Conditional clearing with explicit checks**: Pros: More accurate, as it only clears maps that have actual data; Cons: Requires an additional check, making the code slightly more complex.
*   **Loose conditional clearing**: Pros: Similar to explicit checks but easier to read; Cons: May still clear unnecessary entries if there's a typo in the syntax.

**Libraries and Special Features**

There are no specific libraries mentioned in the benchmark definition. However, it does use JavaScript features like `Map` objects (introduced in ECMAScript 2015) and conditional statements (`if`/`else`).

**Other Considerations**

The benchmark may also depend on factors such as:

*   Cache performance: Maps have a built-in caching mechanism called "storage" that can improve performance.
*   Map implementation details: The actual implementation of the `Map` class in the browser or runtime environment being used can impact performance.

**Alternatives**

Other alternatives for clearing maps could include:

*   Using a different data structure, such as an object with named properties (e.g., `{ a: 1, b: 2 }`)
*   Using a custom-built data structure with optimized clearing mechanisms
*   Implementing manual clearing logic using array methods or other built-in functions

However, the `Map` object is a convenient and efficient way to represent key-value pairs in JavaScript, making it a popular choice for this type of benchmark.

Related benchmarks:

Conditional Map clearing (version: 0)

Comparing performance of: clear vs conditional clear vs loose conditional clear

Created: 4 years ago by: Guest

Jump to the latest result

clear

conditional clear

loose conditional clear

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):