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yongyong
(version: 0)
Comparing performance of:
(Math.round(heading * 10) / 10).toFixed(1) vs (heading).toFixed(1) vs (Math.round(999 * 10) / 10).toString()
Created:
4 years ago
by:
Guest
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Tests:
(Math.round(heading * 10) / 10).toFixed(1)
(Math.round(999 * 10) / 10).toFixed(1)
(heading).toFixed(1)
(999).toFixed(1)
(Math.round(999 * 10) / 10).toString()
(Math.round(999 * 10) / 10).toString()
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
(Math.round(heading * 10) / 10).toFixed(1)
(heading).toFixed(1)
(Math.round(999 * 10) / 10).toString()
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON data and explain what's being tested, compared, and considered in this JavaScript microbenchmark. **Benchmark Definition JSON** The `Name`, `Description`, `Script Preparation Code`, and `Html Preparation Code` fields are empty or null, which means that no specific benchmarking logic is applied to the scripts. This allows users to create their own custom benchmarks. **Individual Test Cases** There are three test cases: 1. `(Math.round(999 * 10) / 10).toFixed(1)` vs `(Math.round(heading * 10) / 10).toFixed(1)` * These two expressions perform the same operation: rounding a number to one decimal place using `Math.round()` and then formatting it as a fixed-point number using `toFixed(1)`. * The difference lies in the variable used for multiplication, which is `heading` in the second expression. This means that the performance of these two expressions will depend on the value of `heading`, making it a dependent benchmark. 2. `(999).toFixed(1)` vs `(heading).toFixed(1)` * These two expressions are similar, but the first one uses a literal number (999) instead of the variable `heading`. * The performance difference between these two expressions will also depend on the value of `heading`, making this another dependent benchmark. 3. `(Math.round(999 * 10) / 10).toString()` vs `(Math.round(999 * 10) / 10).toString()` * This test case is identical, as both expressions convert a number to its string representation using `toString()`. Since the input values are the same, there's no performance difference between these two expressions. **Performance Considerations** The performance results provided for each test case indicate that: 1. The dependent benchmark involving `heading` has different execution times on Chrome 93 across three runs. 2. The standalone expression `(999).toFixed(1)` has a lower execution time than the dependent expression `(heading).toFixed(1)`. 3. The identical expressions have similar execution times. **Library and Special JS Features** There are no explicit libraries mentioned in the provided JSON data. However, `Math.round()` and `toFixed(1)` are standard JavaScript functions. **Other Considerations** * The benchmark results show that the execution time is measured in executions per second (`ExecutionsPerSecond`). * The user agent string (`RawUAString`) indicates that the tests were run on a Chrome browser with version 93. * The device platform and operating system are specified as Desktop (Mac OS X 10.15.7). **Alternatives** To create custom benchmarks, users can: 1. Create their own JavaScript functions and compare them using this tool. 2. Modify existing benchmarks to change the input variables or expressions. Keep in mind that creating a benchmark requires careful consideration of performance characteristics, such as variable dependencies, constant vs variable inputs, and potential optimization paths.
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