Benchmark: lodash forEach vs for i loop vs native forEach 123

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.17.15/lodash.min.js"></script>

Script Preparation code:

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Tests:

lodash.forEach
var count = 0; _.forEach(values, function(v,i) { if (v.a != null) { count++; } })
native for
var count = 0; for (var i = 0; i < values.length; i++) { if (values[i].a != null) { count++; } }
native forEach
var count = 0; values.forEach(function(v) { if (v.a != null) { count++; } })
for of
var count = 0; for (const item of values) { if(item.a !==null) { count++; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.forEach
native for
native forEach
for of

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Safari/537.36 HBPC/12.1.3.306

Browser/OS: Chrome 99 on Windows

View result in a separate tab

Test name	Executions per second
lodash.forEach	157526.2 Ops/sec
native for	7869.5 Ops/sec
native forEach	743650.1 Ops/sec
for of	697299.1 Ops/sec

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

LLMs can make mistakes. Check important info.

It seems like you're sharing benchmark results and test cases from an automated testing environment, possibly for JavaScript library performance. I'll provide a concise answer based on the information provided.

The latest benchmark result shows that:

1. `native forEach` is the fastest, with approximately 743650 executions per second.
2. `for of` is slower, but still quite fast, with about 697299 executions per second.
3. `lodash.forEach` is significantly slower than both native methods, with around 157526 executions per second.

In general, it's not surprising that the native methods (`native for`, `native forEach`) are faster than the library method (`lodash.forEach`). This is because they don't incur additional overhead from function calls and object lookups. The native methods can directly access the array elements using indices or iterators, which makes them more efficient.

On the other hand, `lodash.forEach` likely adds some extra functionality and checks to ensure that the callback function is executed for each element in the array, which might come at a cost in terms of performance.

If you're optimizing JavaScript code for performance, it's generally recommended to use native methods whenever possible. However, if you need to write more complex logic or want to make your code more concise and readable, using a library like Lodash can be beneficial.

Related benchmarks:

lodash forEach vs for i loop vs native forEach 123 (version: 0)

Comparing performance of: lodash.forEach vs native for vs native forEach vs for of

Created: 6 months ago by: Guest

Jump to the latest result

lodash.forEach

native for

native forEach

for of

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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