Benchmark: condition if-else switch map

Tests:

switch
function test(a) { switch(a) { case 0: return 0; case 1: return 0; case 2: return 0; case 3: return 0; case 4: return 0; case 5: return 0; case 6: return 0; case 7: return 0; case 8: return 0; case 9: return 0; case 10: return 0; case 11: return 0; case 12: return 0; default: return 0; } } test(12)
if-else
function test(a) { if (a === 0) { return 0; } else if (a === 1) { return 0; } else if (a === 2) { return 0; } else if (a === 3) { return 0; } else if (a === 4) { return 0; } else if (a === 5) { return 0; } else if (a === 6) { return 0; } else if (a === 7) { return 0; } else if (a === 8) { return 0; } else if (a === 9) { return 0; } else if (a === 10) { return 0; } else if (a === 11) { return 0; } else if (a === 12) { return 0; } else { return 0; } } test(12)
map
function test(a) { const map = new Map([ [0,0], [1,0], [2,0], [3,0], [4,0], [5,0], [6,0], [7,0], [8,0], [9,0], [10,0], [11,0], [12,0], ]) return map.get(a) || 0 } test(12)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
switch
if-else
map

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Browser/OS: Chrome 120 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
switch	1136350720.0 Ops/sec
if-else	1115009536.0 Ops/sec
map	3435309.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its test cases.

**Benchmark Definition:**

The benchmark is defined as a set of three test cases that compare different approaches to handle conditional logic:

1. **Switch statement**: A switch statement with multiple cases, where each case has the same return value (0).
2. **If-else statement**: An if-else statement with multiple conditions and return values.
3. **Map lookup**: Using a Map data structure to store values and retrieve them based on a key.

**Test Cases:**

Each test case has a unique name, description, script preparation code, and HTML preparation code (which is empty in this case). The script preparation code defines the function `test(a)` that will be executed for each test case. The input value `a` determines which branch of the conditional logic to take.

**Switch Statement:**

In the switch statement, the function `test(a)` takes the input `a` and returns 0 based on the following cases:

*   Case 0-12: Return 0 (no need for specific code)
*   Default case: Return 0

This implementation is straightforward but has a significant number of cases, which can make it slower than other approaches.

**If-Else Statement:**

In the if-else statement, the function `test(a)` takes the input `a` and returns 0 based on multiple conditions:

*   If `a === 0`, return 0
*   Else if `a === 1`, return 0
*   ...
*   Else if `a === 12`, return 0
*   Default case: Return 0

This implementation is more straightforward than the switch statement but has a larger number of conditions, which can make it slower.

**Map Lookup:**

In the map lookup, the function `test(a)` takes the input `a` and returns 0 by looking up the value in the Map:

*   Create a Map with key-value pairs: `[0, 0], [1, 0], ..., [12, 0]`
*   Use the `get()` method to retrieve the value associated with the input `a`, or return 0 if not found

This implementation is more concise and efficient than the switch statement or if-else statement.

**Pros and Cons:**

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

*   **Switch Statement:**
    *   Pros:
        *   Easy to read and understand
        *   Can be faster due to direct branching
    *   Cons:
        *   Has a large number of cases, making it slower
        *   May not be suitable for larger numbers of cases
*   **If-Else Statement:**
    *   Pros:
        *   More straightforward than switch statements
        *   Can be faster due to less branching
    *   Cons:
        *   Has a large number of conditions, making it slower
        *   May not be suitable for very large numbers of conditions
*   **Map Lookup:**
    *   Pros:
        *   More concise and efficient than switch statements or if-else statements
        *   Can handle larger numbers of cases without significant performance degradation
    *   Cons:
        *   May require more memory to store the Map

**Other Alternatives:**

Other alternatives for handling conditional logic include:

*   **Array lookups**: Instead of using a Map, you can use an array with a single value and check if the input `a` matches the value.
*   **Object lookups**: Similar to Map lookup, but uses objects instead of key-value pairs.
*   **Recursive functions**: You can implement recursive functions that handle conditional logic, which can be more concise than switch statements or if-else statements.

Keep in mind that the best approach depends on the specific use case and performance requirements.

Related benchmarks:

condition if-else switch map (version: 0)

Comparing performance of: switch vs if-else vs map

Created: 4 years ago by: Registered User

Jump to the latest result

switch

if-else

map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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