Benchmark: Quotes vs no quotes

Tests:

With quotes
var obj = { 'key_001': 'Value 001', 'key_002': 'Value 002', 'key_003': 'Value 003', 'key_004': 'Value 004', 'key_005': 'Value 005', 'key_006': 'Value 006', 'key_007': 'Value 007', 'key_008': 'Value 008', 'key_009': 'Value 009', 'key_010': 'Value 010', 'key_011': 'Value 011', 'key_012': 'Value 012', 'key_013': 'Value 013', 'key_014': 'Value 014', 'key_015': 'Value 015', 'key_016': 'Value 016', 'key_017': 'Value 017', 'key_018': 'Value 018', 'key_019': 'Value 019', 'key_020': 'Value 020', 'key_021': 'Value 021', 'key_022': 'Value 022', 'key_023': 'Value 023', 'key_024': 'Value 024', 'key_025': 'Value 025', 'key_026': 'Value 026', 'key_027': 'Value 027', 'key_028': 'Value 028', 'key_029': 'Value 029', 'key_030': 'Value 030', 'key_031': 'Value 031', 'key_032': 'Value 032', 'key_033': 'Value 033', 'key_034': 'Value 034', }; for (var key in obj) { key = null; }
Without quotes
var obj = { key_001: 'Value 001', key_002: 'Value 002', key_003: 'Value 003', key_004: 'Value 004', key_005: 'Value 005', key_006: 'Value 006', key_007: 'Value 007', key_008: 'Value 008', key_009: 'Value 009', key_010: 'Value 010', key_011: 'Value 011', key_012: 'Value 012', key_013: 'Value 013', key_014: 'Value 014', key_015: 'Value 015', key_016: 'Value 016', key_017: 'Value 017', key_018: 'Value 018', key_019: 'Value 019', key_020: 'Value 020', key_021: 'Value 021', key_022: 'Value 022', key_023: 'Value 023', key_024: 'Value 024', key_025: 'Value 025', key_026: 'Value 026', key_027: 'Value 027', key_028: 'Value 028', key_029: 'Value 029', key_030: 'Value 030', key_031: 'Value 031', key_032: 'Value 032', key_033: 'Value 033', key_034: 'Value 034', }; for (var key in obj) { key = null; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
With quotes
Without quotes

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases to explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition is quite simple, with only two main parts:

1. The script preparation code: This is where the JavaScript object (`obj`) is defined without quotes.
2. The HTML preparation code: Unfortunately, this field is empty for all test cases.

However, there's a crucial part in one of the test case definitions that affects how the benchmark behaves:
   ```
for (var key in obj) {
    key = null;
}
```
This line resets the `key` variable to `null`, which can lead to unexpected behavior when using `in` operator or other methods that rely on `Object.keys()` internally.

**Test Cases**

There are two test cases, each representing a different scenario:

### 1. "With quotes"

In this case:
   ```
var obj = {
    'key_001': 'Value 001',
    'key_002': 'Value 002',
    ...
}
```
The JavaScript object `obj` is defined with quotes around the keys.

**2. "Without quotes"**

Here, 
   ```javascript
var obj = {
    key_001: 'Value 001',
    key_002: 'Value 002',
    ...
}
```
The JavaScript object `obj` is defined without quotes around its keys.

**Comparison and Pros/Cons**

When comparing these two test cases, we're essentially measuring the performance difference in accessing a JavaScript object with quoted or unquoted keys.

- **Pros of "With quotes"**: This approach ensures consistency in key notation across different environments, reducing potential issues related to case insensitivity or quoting inconsistencies.

- Cons: With quotes, you may incur additional memory overhead due to the use of string literals for your keys.

**Pros of "Without quotes"**

Using unquoted keys might provide a slight performance boost by potentially avoiding extra work when using methods that rely on `in` operator or `Object.keys()`, but this is largely dependent on how these libraries are implemented under the hood. Keep in mind that it may lead to issues with certain environment-specific behavior, which can make debugging more difficult.

- Cons: Without quotes, different environments might produce inconsistent results due to differences in how they interpret key names. This could lead to inconsistencies across different platforms or browsers.

**Other Considerations**

- **ES6 and Later Syntax**: Modern JavaScript (starting from ES6) allows for template literals and other features that simplify object creation.

- **Browser Variability**: The choice between quoted and unquoted keys may impact browser behavior, as each major browser has its unique implementation quirks. For example, Chrome 85 uses strict mode by default, where quoting your property names is necessary to avoid issues related to the `in` operator or other methods.

- **Alternative Approaches**: Some JavaScript environments (like Node.js) support using either quoted or unquoted keys in object literals without a significant impact on performance. This highlights the importance of considering specific use cases and environments when choosing between these approaches.

To mitigate potential inconsistencies, consider using a consistent notation across your applications and testing for compatibility with different browsers and environments when necessary.

Related benchmarks:

Quotes vs no quotes (version: 0)

Comparing performance of: With quotes vs Without quotes

Created: 5 years ago by: Guest

Jump to the latest result

With quotes

Without quotes

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):