Benchmark: Remove bearer prefix from JWT token

Script Preparation code:

var prefix = 'Bearer ';
var jwt = `${prefix}eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0ZXN0Ijp0cnVlfQ.MCkuWniYZWV396Q-ua6yoUSpYoEjXZmNP-pO57oU-JU`;

Tests:

split
jwt.split(prefix)[1]
replace
jwt.replace(prefix, '')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
replace

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 16 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Windows

View result in a separate tab

Test name	Executions per second
split	6128766.0 Ops/sec
replace	17399280.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark JSON and explain what's being tested.

**Benchmark Definition**

The benchmark is named "Remove bearer prefix from JWT token" and has two test cases: `split` and `replace`.

**What are we testing?**

We're testing two ways to remove the "Bearer " prefix from a JWT (JSON Web Token) string. A JWT is a type of digital signature used to authenticate claims made about an identity.

**Options being compared**

There are two options being compared:

1. **`jwt.split(prefix)[1]`**: This approach splits the JWT string at the `prefix` and takes the second element of the resulting array (index 1). The idea is that this will remove the prefix from the JWT token.
2. **`jwt.replace(prefix, '')`**: This approach uses the `replace()` method to replace all occurrences of the `prefix` with an empty string (`''`). The idea is that this will also remove the prefix from the JWT token.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **`jwt.split(prefix)[1]`**:
	* Pros: Simple, straightforward implementation.
	* Cons: May not work correctly if the prefix appears multiple times in the JWT string (will only remove the first occurrence).
2. **`jwt.replace(prefix, '')`**:
	* Pros: Will remove all occurrences of the prefix from the JWT string, regardless of its position.
	* Cons: May be slower than `split()` since it involves a more complex algorithm.

**Library and special JS feature**

There is no library being used in this benchmark. However, the `jwt` variable appears to be a JSON Web Token string, which may use some special JavaScript features (e.g., template literals) to construct the token.

**Other considerations**

* The benchmark uses a simple, hardcoded prefix value ("Bearer ").
* It's not clear what kind of inputs or edge cases are being tested in this benchmark.
* There is no consideration for error handling or fallbacks if the prefix cannot be removed (e.g., invalid input).

**Alternatives**

Some alternative approaches to removing prefixes from strings in JavaScript might include:

1. Using a regular expression (`/Bearer /g`) instead of `split()` or `replace()`.
2. Using a library like `str-splice` which provides a more efficient way to remove substrings.
3. Using a custom implementation that takes into account the specific requirements of JWT tokens.

However, it's worth noting that these alternatives may not be relevant for this particular benchmark, and the `split()` or `replace()` approaches are likely sufficient for most use cases.

Related benchmarks:

Remove bearer prefix from JWT token (version: 0)

Comparing performance of: split vs replace

Created: 2 years ago by: Guest

Jump to the latest result

split

replace

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):