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set test
(version: 0)
Comparing performance of:
set full vs set already set
Created:
3 years ago
by:
Guest
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Tests:
set full
function processComparator(o) { let s; if (o) { s = ' ' + o + ' '; } return s; } console.log(processComparator('test'));
set already set
function processComparator(o) { let s = ''; if (o) { s = ' ' + o + ' '; } return s; } console.log(processComparator('test'));
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
set full
set already set
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
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON benchmark data to understand what is being tested. **Benchmark Definition** The benchmark definition is a simple JavaScript function that concatenates a string with the input value `o`. The function returns the concatenated string. The two variations of this function are: 1. **processComparator (full)**: This function first declares an empty variable `s`, then checks if `o` is truthy, and if so, concatenates `' ' + o + ' '` to `s`. Finally, it returns the value of `s`. 2. **processComparator (already set)**: Similar to the previous one, but the initialization of `s` is different. This function directly assigns a string literal `' ' + o + ' '` to `s`, without declaring an empty variable. **Options Compared** The two functions being compared are: * Using a declared variable (`s`) vs. using a direct assignment to concatenate the strings. * Initializing the variable before or after checking the condition. **Pros and Cons of Each Approach** 1. **Declared Variable (processComparator full)**: * Pros: Easier to understand and maintain, as it clearly separates the initialization from the assignment. * Cons: May have performance overhead due to the extra step of declaring a new variable. 2. **Direct Assignment (processComparator already set)**: * Pros: More concise code, potentially faster execution since no additional variable is declared. * Cons: Less readable and maintainable, as it combines multiple operations in a single statement. **Library and Special JS Features** There are no libraries used in this benchmark definition. Additionally, there are no special JavaScript features or syntax being tested in these benchmarks. **Other Alternatives** In theory, other approaches to concatenate strings could be compared, such as using template literals (`${o}`) or the `+` operator with string interpolation: ```javascript function processComparator(o) { return o ? ' ' + o + ' ' : ''; } ``` However, these alternatives are not present in the provided benchmark data. **Benchmark Preparation Code and Test Case Explanation** The preparation code is empty for both benchmarks. This suggests that the focus is on comparing the two implementation variations rather than introducing additional factors that could affect performance or readability. Each test case has a unique name ("set full" and "set already set") but does not seem to have any specific purpose other than serving as a distinct measurement point. **Latest Benchmark Result** The latest benchmark result shows the execution counts per second for each test case on a Chrome 111 browser running on Windows. The results suggest that both implementations have similar performance characteristics, with slight variations in the `processComparator full` variant (347274.40625 executions per second) compared to the `processComparator already set` variant (342642.125 executions per second).
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