Benchmark: test + replace vs replace all

Tests:

test + replace
const RGX = /@test\((.+)\)@/; const message1 = 'dfsdf sdfag e@plural(yo)@a fafddsFAS DF ASDF SDF'; const message2 = 'dfsdf sdfag ea fafddsFAS DF ASDF SDF'; const message3 = 'dfsdf sdfag ea fzzxczxczxczxczxc'; const replaceIt = (message) => { return message.replace(RGX, (match, group) => { return group }) }; if (RGX.test(message1)) replaceIt(message1); if (RGX.test(message2)) replaceIt(message2); if (RGX.test(message3)) replaceIt(message3);
replace
const RGX = /@test\((.+)\)@/; const message1 = 'dfsdf sdfag e@plural(yo)@a fafddsFAS DF ASDF SDF'; const message2 = 'dfsdf sdfag ea fafddsFAS DF ASDF SDF'; const message3 = 'dfsdf sdfag ea fzzxczxczxczxczxc'; const replaceIt = (message) => { return message.replace(RGX, (match, group) => { return group }) }; replaceIt(message1); replaceIt(message2); replaceIt(message3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test + replace
replace

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
test + replace	26213884.0 Ops/sec
replace	9630894.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark definition represents two different approaches to replacing a specific pattern in a string:

1. `test + replace`: This approach uses the `test()` method to check if the pattern exists in the string, and only then applies the replacement using the `replace()` method.
2. `replace`: This approach directly applies the replacement without checking if the pattern exists.

**Options being compared**

The two options are:

1. Using `test()` followed by `replace()`
2. Directly applying `replace()` (without `test()`)

**Pros and Cons of each approach**

1. **`test + replace`**
	* Pros:
		+ More efficient, as it only applies replacement when the pattern is found
		+ May be faster for large strings with multiple occurrences of the pattern
	* Cons:
		+ Requires an additional function call (`test()`), which can introduce overhead
2. **`replace`**
	* Pros:
		+ Simplifies code, as only one replacement operation is needed
		+ May be more efficient for small strings or when the pattern is guaranteed to exist
	* Cons:
		+ May not be as efficient for large strings with multiple occurrences of the pattern

**Library and special JavaScript features**

The benchmark uses a regular expression (RGX) object, which is a built-in feature in JavaScript. The `test()` and `replace()` methods are part of the String prototype, making them easily accessible.

There are no special JavaScript features mentioned in this benchmark.

**Other alternatives**

If you're looking for alternative approaches to replace strings, consider:

1. Using a library like `regex-replace` (a popular regular expression replacement library)
2. Implementing your own custom replacement function
3. Using a string manipulation library or framework (e.g., Underscore.js)

In general, the choice of approach depends on the specific use case and performance requirements.

**Recommendations**

For this benchmark, I would recommend using the `test + replace` approach if you need to handle large strings with multiple occurrences of the pattern. However, for small strings or when the pattern is guaranteed to exist, the `replace` approach may be sufficient.

If you're interested in exploring alternative approaches, consider experimenting with different libraries and custom implementation to find the most efficient solution for your specific use case.

Related benchmarks:

test + replace vs replace all (version: 0)

Comparing performance of: test + replace vs replace

Created: one year ago by: Guest

Jump to the latest result

test + replace

replace

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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