Benchmark: lowercase VS 2if v2

Script Preparation code:

x = {a:'AAAA',b:'BBBB', c:'aaaa'};
y = {v:'aCaca'};
z = {[x.a]:true,[x.c]:true}
s = new Set([x.a,x.c]);

Tests:

lowercase
y.v.toLowerCase().includes(x.c)
2if
y.v === x.a || y.v === x.c
1 not if
y.v !== x.b
dict
!!z[y.v]
set
s.has(y.v)
not not
!!(y.v)
Boolean
Boolean(y.v)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lowercase
2if
1 not if
dict
set
not not
Boolean

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 YaBrowser/20.3.1.195 Yowser/2.5 Yptp/1.23 Safari/537.36

Browser/OS: Yandex Browser 20 on Windows

View result in a separate tab

Test name	Executions per second
lowercase	2730333.8 Ops/sec
2if	1592053.8 Ops/sec
1 not if	3219851.5 Ops/sec
dict	3467688.2 Ops/sec
set	2982018.2 Ops/sec
not not	7039570.5 Ops/sec
Boolean	3456292.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Overview**

The benchmark is designed to measure the performance of different JavaScript operations on a specific input data set. The script preparation code defines two objects, `x` and `y`, which contain strings with uppercase and lowercase letters. Another object, `z`, contains keys that reference the values from `x`. A Set, `s`, is also created containing the values from `x`.

**Test Cases**

There are six test cases in total:

1. **lowercase**: Tests if a string value from `y` can be compared to a string value from `x` using the `.toLowerCase()` method.
2. **2if**: Tests if a string value from `y` is equal to either of two values from `x` using the `||` operator.
3. **1 not if**: Tests if a string value from `y` is not equal to one specific value from `x`.
4. **dict**: Tests if a boolean value can be determined by checking if a key exists in an object (`!!z[y.v]`).
5. **set**: Tests if a string value from `y` exists in a Set containing values from `x` (`s.has(y.v)`).
6. **not not**: Tests if the negation of a boolean value is equal to its original value (`!!(y.v)`).

**Comparison Options**

The test cases are comparing different JavaScript operations:

* `.toLowerCase()` vs `2if` (case sensitivity)
* `||` operator vs `===` for equality checks
* `hasOwnProperty()` or direct property access vs using a Set for fast lookup
* Boolean negation (`!!`) vs implicit boolean conversion

**Pros and Cons**

Here's a brief overview of the pros and cons of each approach:

1. `.toLowerCase()`: Pros: case-insensitive comparison, easy to implement. Cons: slower than direct comparisons.
2. `2if` operator: Pros: fast and efficient, easy to read. Cons: case-sensitive, may lead to errors if not used carefully.
3. `||` operator for equality checks: Pros: fast and flexible, can be used for multiple conditions. Cons: may lead to unexpected behavior if not used carefully.
4. Using a Set for fast lookup: Pros: extremely fast lookups, efficient memory usage. Cons: requires more memory than direct property access.
5. Boolean negation (`!!`): Pros: concise, easy to use. Cons: can be confusing, especially for beginners.

**Other Alternatives**

For those interested in alternative approaches:

* Instead of using `.toLowerCase()`, you could use a case-insensitive comparison library like `case-Insensitive-String`.
* For fast lookup, you could also consider using a data structure like a `Map` instead of a Set.
* For equality checks with multiple conditions, you could use an `if-else` statement or a more functional approach with a `map` function.

Keep in mind that the choice of implementation depends on the specific requirements and performance characteristics of your project.

Related benchmarks:

lowercase VS 2if v2 (version: 5)

Comparing performance of: lowercase vs 2if vs 1 not if vs dict vs set vs not not vs Boolean

Created: 4 years ago by: Registered User

Jump to the latest result

lowercase

2if

1 not if

dict

set

not not

Boolean

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):