Benchmark: precreate string or use in condition

Script Preparation code:

var arr = Array.from({ length: 1000 }).map((a, index) => String(index * 347));
var FIXED_STRING = '3470';
var i = 0;
var j = 0;

Tests:

with fixed string
let ii; const ll = arr.length; for (ii = 0; ii < ll; ii++) { if (arr[ii] === FIXED_STRING) { i++; } }
with dynamic string
let ii; const ll = arr.length; for (ii = 0; ii < ll; ii++) { if (arr[ii] === '3470') { i++; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
with fixed string
with dynamic string

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.

Measuring the performance of JavaScript code can be a complex task, but I'll break it down into understandable parts.

**Benchmark Definition JSON**

The provided JSON defines two benchmark test cases:

1. "with fixed string"
2. "with dynamic string"

Both tests use an array `arr` created with `Array.from()` and populated with strings generated by multiplying numbers from 0 to 999 with a constant (347). A variable `FIXED_STRING` is defined as '3470', which will be used for the "fixed string" test. For the "dynamic string" test, the comparison uses the exact string '3470'.

**Options Compared**

The two tests compare the performance of JavaScript code under different conditions:

1. Using a fixed string ('3470') vs.
2. Using a dynamic string (generated by multiplying numbers with 347) in a condition.

**Pros and Cons**

**Fixed String:**

Pros:

* Predictable performance, as the comparison is always exact
* May be faster due to less overhead from comparing strings

Cons:

* May not cover real-world scenarios where exact matches are rare or complex
* Less representative of typical string comparisons

**Dynamic String:**

Pros:

* More realistic, as it simulates common use cases with varying strings
* Can help detect performance issues in handling dynamic conditions

Cons:

* May introduce additional overhead due to comparing strings (e.g., using `===` or `==`)
* Performance may vary depending on the string comparison algorithm used by JavaScript engines

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition, but it's possible that libraries like Lodash or Ramda are used indirectly through JavaScript standard library functions.

**Special JS Features/Syntax**

None are explicitly mentioned. However, note that the use of `Array.from()` and template literals (`String(index * 347)`) might be specific to modern JavaScript versions (ECMAScript 2015+).

**Other Alternatives**

If you're looking for alternative approaches or variations on these tests:

* Test with an empty array instead of a populated one to measure the overhead of creating an array.
* Use different data structures, such as linked lists or trees, in place of arrays.
* Compare performance with other JavaScript engines or versions (e.g., Node.js, TypeScript).
* Experiment with different string comparison techniques, like using regular expressions or Unicode-aware comparisons.

Keep in mind that these alternatives will likely alter the benchmark's focus and accuracy.

Related benchmarks:

precreate string or use in condition (version: 0)

Comparing performance of: with fixed string vs with dynamic string

Created: 3 years ago by: Guest

Jump to the latest result

with fixed string

with dynamic string

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):