Benchmark: dict allocation vs if

Tests:

dict
const dict = {}; dict['test1'] = 'sth1'; dict['test2'] = 'sth2'; dict['test3'] = 'sth3'; let t = 'nn'; console.log(dict[t]); t='test1'; console.log(dict[t]); t='test2'; console.log(dict[t]); t='test3'; console.log(dict[t]);
if
let t = 'nn'; if(t === 'test1') { console.log('sth1'); } else if(t == 'test2') { console.log('sth2'); } else if(t == 'test3') { console.log('sth3'); } else { console.log(undefined); } t='test1'; if(t === 'test1') { console.log('sth1'); } else if(t == 'test2') { console.log('sth2'); } else if(t == 'test3') { console.log('sth3'); } else { console.log(undefined); } t='test2'; if(t === 'test1') { console.log('sth1'); } else if(t == 'test2') { console.log('sth2'); } else if(t == 'test3') { console.log('sth3'); } else { console.log(undefined); } t='test3'; if(t === 'test1') { console.log('sth1'); } else if(t == 'test2') { console.log('sth2'); } else if(t == 'test3') { console.log('sth3'); } else { console.log(undefined); }
switch
let t='nn'; switch(t) { case 'test1': console.log('sth1'); break; case 'test2': console.log('sth2'); break; case 'test3': console.log('sth3'); break; default: console.log(undefined); } t='test1'; switch(t) { case 'test1': console.log('sth1'); break; case 'test2': console.log('sth2'); break; case 'test3': console.log('sth3'); break; default: console.log(undefined); } t='test2'; switch(t) { case 'test1': console.log('sth1'); break; case 'test2': console.log('sth2'); break; case 'test3': console.log('sth3'); break; default: console.log(undefined); } t='test3'; switch(t) { case 'test1': console.log('sth1'); break; case 'test2': console.log('sth2'); break; case 'test3': console.log('sth3'); break; default: console.log(undefined); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
dict
if
switch

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Measuring the performance of different approaches in JavaScript is crucial for optimizing code and making informed decisions about development choices.

The provided benchmark measures three different approaches to accessing elements from an object: direct object access, if-else statement, and switch statement. We'll break down each approach and discuss their pros and cons:

**1. Direct Object Access (dict allocation vs if)**

In this approach, we directly access the object using its key-value pairs.

```javascript
const dict = {};
dict['test1'] = 'sth1';
dict['test2'] = 'sth2';
dict['test3'] = 'sth3';

let t = 'nn';
console.log(dict[t]);
t = 'test1';
console.log(dict[t]);
t = 'test2';
console.log(dict[t]);
t = 'test3';
console.log(dict[t]);
```

Pros:

* Direct and efficient access to object elements.
* No overhead from conditional statements.

Cons:

* Requires the key to be defined in advance.
* Might not work as expected if the object is updated dynamically.

**2. If-Else Statement (if)**

In this approach, we use an if-else statement to determine which value to retrieve.

```javascript
let t = 'nn';
if(t === 'test1') {
  console.log('sth1');
} else if(t == 'test2') {
  console.log('sth2');
} else if(t == 'test3') {
  console.log('sth3');
} else {
  console.log(undefined);
}

t = 'test1';
if(t === 'test1') {
  console.log('sth1');
} else if(t == 'test2') {
  console.log('sth2');
} else if(t == 'test3') {
  console.log('sth3');
} else {
  console.log(undefined);
}

// ...
```

Pros:

* Flexible and can handle dynamic key updates.
* Easy to implement and maintain.

Cons:

* Has overhead due to the conditional statements.
* Might be slower than direct object access for large datasets.

**3. Switch Statement (switch)**

In this approach, we use a switch statement to determine which value to retrieve.

```javascript
let t = 'nn';
switch(t) {
  case 'test1':
    console.log('sth1');
    break;
  case 'test2':
    console.log('sth2');
    break;
  case 'test3':
    console.log('sth3');
    break;
  default:
    console.log(undefined);
}

t = 'test1';
switch(t) {
  case 'test1':
    console.log('sth1');
    break;
  case 'test2':
    console.log('sth2');
    break;
  case 'test3':
    console.log('sth3');
    break;
  default:
    console.log(undefined);
}

// ...
```

Pros:

* Similar to if-else, but more concise and readable.
* Can handle multiple key-value pairs.

Cons:

* Has overhead due to the switch statement.
* Might not work as expected for large datasets or complex logic.

The benchmark results show that direct object access (dict allocation) is generally the fastest approach, followed by switch statements, and then if-else statements. However, it's essential to consider the specific requirements of your use case and choose the approach that best fits your needs.

In general, if you need to frequently access elements from an object using a key-value pair, direct object access might be the most efficient choice. If you need to handle dynamic key updates or have a large dataset, an if-else statement or switch statement might be more suitable.

Keep in mind that these results are specific to this benchmark and may not hold true for other scenarios. Always test and measure performance in your specific use case to ensure optimal results.

Related benchmarks:

dict allocation vs if (version: 0)

Comparing performance of: dict vs if vs switch

Created: 3 years ago by: Guest

Jump to the latest result

dict

if

switch

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):