Benchmark: String to number fork

Tests:

parseInt
parseInt("1")
parseFloat
parseFloat("1")
Math.floor
Math.floor("1")
ceil
Math.ceil("1")
Unary
+"1"
"1" * 1
"1" * 1
Class
Number("1")
div
"1" / 1
<<
"1" << 0

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt
parseFloat
Math.floor
ceil
Unary
"1" * 1
Class
div
<<

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15

Browser/OS: Safari 13 on Mac OS X 10.15.4

View result in a separate tab

Test name	Executions per second
parseInt	7924738.5 Ops/sec
parseFloat	7882457.0 Ops/sec
Math.floor	7623125.0 Ops/sec
ceil	7811979.0 Ops/sec
Unary	70452280.0 Ops/sec
"1" * 1	70579792.0 Ops/sec
Class	7848283.0 Ops/sec
div	41040524.0 Ops/sec
<<	37482560.0 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 JavaScript microbenchmarks and explore what's being tested on the provided JSON.

**Benchmark Definition**
The benchmark definition is simply a string representing a JavaScript expression that will be executed in isolation. In this case, there are two types of expressions:

1. **Parser expressions**: These are expressions that need to be parsed by the JavaScript parser, such as `parseInt("1")`, `parseFloat("1")`, and `Math.floor("1")`. The browser must parse the expression into an abstract syntax tree (AST) before executing it.
2. **Operator expressions**: These are expressions that rely on operator overloading, such as `"1" * 1` or `"1" / 1`. In these cases, the browser must interpret the operator and execute the corresponding function.

**Options Compared**
The benchmark compares different approaches to executing JavaScript expressions:

1. **Parser expressions**: Each test case measures the performance of parsing a specific expression using the `parseInt`, `parseFloat`, or `Math.floor` functions.
2. **Operator expressions**: Each test case measures the performance of executing an operator expression, such as `"1" * 1` or `"1" / 1`.

**Pros and Cons**

* **Parser expressions**:
	+ Pros: Can be used to measure the performance of specific parsing algorithms or optimizations in the JavaScript engine.
	+ Cons: May not accurately reflect real-world usage patterns, where operators are often used as-is.
* **Operator expressions**:
	+ Pros: More representative of real-world usage patterns, as they simulate the use of operators in JavaScript code.
	+ Cons: Can be more complex to interpret and execute correctly, which may lead to variations in performance.

**Libraries and Special Features**
None of the test cases use any external libraries. However, some expressions rely on built-in JavaScript features:

* `Math.floor` and `Math.ceil` functions
* Operator overloading (e.g., `"1" * 1`)

**Other Considerations**

* **JavaScript engine optimizations**: The benchmark may not accurately reflect optimizations applied by the JavaScript engine, such as inlining or caching.
* **Browser-specific differences**: Different browsers may implement JavaScript features differently, leading to variations in performance.

**Alternatives**
If you're interested in exploring alternative benchmarks or testing frameworks, here are a few options:

1. **V8 Profiler**: A built-in profiler for the V8 JavaScript engine used by Google Chrome.
2. **SpiderMonkey Profiler**: A built-in profiler for the SpiderMonkey JavaScript engine used by Mozilla Firefox.
3. **Node.js Performance Tools**: Built-in performance tools for Node.js, such as the `--expose-gc` flag to enable garbage collection profiling.

Keep in mind that each of these alternatives has its own strengths and weaknesses, and may not be suitable for your specific use case.

Related benchmarks:

String to number fork (version: 0)

Comparing performance of: parseInt vs parseFloat vs Math.floor vs ceil vs Unary vs "1" * 1 vs Class vs div vs <<

Created: 4 years ago by: Guest

Jump to the latest result

parseInt

parseFloat

Math.floor

ceil

Unary

"1" * 1

Class

div

<<

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):