Benchmark: Regex removing whitespace vs trim gan

Script Preparation code:

var string = 'Date/Time, DynamX_SHKX, DynamX_SHKY, DynamX_SHKZ, DynamX_SHKLAT, DynamX_SHKLATAVG, DynamX_SHKRSK, DynamX_SHK_AXL_TOT, DynamX_SHKTY, DynamX_SHKTZ, DynamX_SHK_LAT_TOT, DynamX_ACCMINLAT, DynamX_SHK_AXL_MAX, DynamX_ACCYMAX, DynamX_ACCZMAX, DynamX_SHK_LAT_MAX, DynamX_ACCXAVG, DynamX_ACCYAVG, DynamX_ACCZAVG, DynamX_ACCLATAVG, DynamX_CRPM_MIN, DynamX_CRPM_MAX, DynamX_CPRM_AVG, DynamX_RPM_RAW, DynamX_STUCKEVT, DynamX_STUCKCNT, DynamX_NEGEVT, DynamX_NEGCNT, DynamX_STKSLP_RM, DynamX_STKSLP_Level, DynamX_STICK_RT,AXIAL_SHKRSK,SHKRSK_2019,Vibe_Axl_Max,Vibe_Lat_Max'

Tests:

regex
string.split(/\s*,\s*/)
trim
string.split(',').map(s=> s.trim())

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
trim

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser/OS: Chrome 129 on Windows

View result in a separate tab

Test name	Executions per second
regex	1384128.0 Ops/sec
trim	3631182.0 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark compares two approaches to remove whitespace from a string: using regular expressions (regex) and trimming the string.

**What is tested?**

In this benchmark, we have two individual test cases:

1. **Regex**: This test case uses `string.split(/\\s*,\\s*/)` to split the input string into an array of substrings, separated by whitespace characters (`\s*` is a special regex character that matches any amount of whitespace).
2. **Trim**: This test case uses `string.split(',').map(s => s.trim())` to split the input string into an array of substrings, separated by commas (`,`). The `trim()` method then removes whitespace characters from each substring.

**Options compared**

We have two options being compared:

1. **Regex**: Using regular expressions to split the string.
2. **Trim**: Using the built-in `split` and `trim` methods.

**Pros and Cons of each approach:**

1. **Regex**
	* Pros:
		+ Flexible and powerful for complex string manipulation.
		+ Can be used for more than just whitespace removal (e.g., matching patterns).
	* Cons:
		+ Performance can be slower compared to built-in methods.
		+ Requires knowledge of regular expression syntax, which can add complexity.
2. **Trim**
	* Pros:
		+ Fast and efficient, as it's a built-in method optimized for performance.
		+ Easy to use and understand, even for those without regex expertise.
	* Cons:
		+ Limited functionality compared to regex; only removes whitespace characters.

**Library used**

In this benchmark, the `split()` and `trim()` methods are used. These are built-in JavaScript methods that don't require any external libraries.

**Special JS feature or syntax**

None mentioned in the provided code snippet.

**Other alternatives**

If you wanted to compare additional approaches, some alternative methods for removing whitespace could include:

1. **Using a custom function**: You could write your own function using a loop or recursion to remove whitespace characters from the string.
2. **Using a different splitting method**: Instead of using commas or regex, you could use another delimiter (e.g., semicolons) or try a different approach altogether.

Keep in mind that these alternatives might not be as efficient or easy to understand as the built-in `trim()` method and regex approach used in this benchmark.

Related benchmarks:

Regex removing whitespace vs trim gan (version: 0)

testing removing beginning and end whitespace vs trim

Comparing performance of: regex vs trim

Created: 4 years ago by: Guest

Jump to the latest result

regex

trim

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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