Benchmark: double integers by * operator and left shift

Tests:

by * operator (2)
let a = 2; a * 2;
by * operator (9999999999)
let b = 9999999999; b * 2;
by * operator (999999999999999)
let c = 999999999999999; c * 2;
by left shift (2 << 1)
let d = 2; d << 1;
by left shift (9999999999 << 2)
let e = 9999999999; e << 1;
by left shift (999999999999999 << 2)
let f = 999999999999999; f << 1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
by * operator (2)
by * operator (9999999999)
by * operator (999999999999999)
by left shift (2 << 1)
by left shift (9999999999 << 2)
by left shift (999999999999999 << 2)

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

**What is being tested on the provided JSON?**

The provided JSON represents a set of JavaScript microbenchmarks, specifically testing two operators: the multiplication asterisk (`*`) and the left shift bitshift (`<<`).

Each test case provides a simple script that performs one of these operations with different inputs. For example, some scripts calculate `a * 2`, while others calculate `b << 1`. The goal is to compare the performance of different implementations of these operators.

**Options being compared**

Two main options are being compared:

1. **Multiplication Asterisk (`*`)**:
	* In JavaScript, the multiplication asterisk is a binary operation that multiplies two numbers and returns their product.
2. **Left Shift Bitshift (`<<`)**:
	* In JavaScript, the left shift bitshift is an arithmetic operation that shifts the bits of a number to the left by a specified amount.

**Pros and Cons**

**Multiplication Asterisk (`*`):**

Pros:

* Widely supported in most programming languages
* Well-established performance characteristics

Cons:

* Can be slower for large numbers due to multiplication
* May incur overhead due to function calls or method invocation

**Left Shift Bitshift (`<<`):**

Pros:

* Typically faster than multiplication for large numbers
* Can be more efficient in terms of machine code generation

Cons:

* Less widely supported across programming languages
* May not work correctly with all integer types (e.g., unsigned)

**Other Considerations**

When testing these operators, other factors to consider include:

* Optimizations: Are any optimizations applied by the JavaScript engine or interpreter?
* Data type: How do different data types (e.g., signed vs. unsigned) affect performance?
* Platform dependencies: Are there platform-specific differences in behavior or optimization?

**Library Usage**

The provided benchmark script uses no external libraries, which is likely intentional to isolate the performance characteristics of each operator.

**Special JavaScript Features or Syntax**

None mentioned explicitly in the provided JSON.

**Alternatives**

If you want to explore alternative approaches for testing these operators, consider:

* **Custom-built microbenchmarks**: Implement your own scripts using a language like C++ or Python to gain more control over the test environment.
* **Existing benchmarking frameworks**: Utilize established benchmarking frameworks like Benchmark.js or Microbenchmark.js, which provide a structured approach to writing and running benchmarks.

Keep in mind that these alternatives might require additional setup and maintenance, but they can offer more flexibility and control over your testing environment.

Related benchmarks:

double integers by * operator and left shift (version: 0)

Comparing performance of: by * operator (2) vs by * operator (9999999999) vs by * operator (999999999999999) vs by left shift (2 << 1) vs by left shift (9999999999 << 2) vs by left shift (999999999999999 << 2)

Created: 4 years ago by: Registered User

Jump to the latest result

by * operator (2)

by * operator (9999999999)

by * operator (999999999999999)

by left shift (2 << 1)

by left shift (9999999999 << 2)

by left shift (999999999999999 << 2)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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