var cacheName ='';
componentsCfg = {};
componentsCfg.v = 1;
componentsCfg.h = 'asdf';
cacheName = (componentsCfg.v && componentsCfg.h) ? 'ch-' + componentsCfg.v + '-' + componentsCfg.h : 'ch';
if(componentsCfg.v && componentsCfg.h) {
cacheName = 'ch-' + componentsCfg.v + '-' + componentsCfg.h;
} else {
cacheName = 'ch';
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Ternary with Concat | |
Traditional If/Else with Concat |
Test name | Executions per second |
---|---|
Ternary with Concat | 812205.2 Ops/sec |
Traditional If/Else with Concat | 791233.1 Ops/sec |
Let's break down the provided benchmark and explain what is being tested.
Benchmark Definition
The test case is comparing two approaches to generate a cacheName
variable:
cacheName = (componentsCfg.v && componentsCfg.h) ? 'ch-' + componentsCfg.v + '-' + componentsCfg.h : 'ch';
if(componentsCfg.v && componentsCfg.h) {\r\n\tcacheName = 'ch-' + componentsCfg.v + '-' + componentsCfg.h;\r\n} else {\r\n \tcacheName = 'ch';\r\n}
What is being tested?
The test is measuring the performance difference between these two approaches. Specifically, it's comparing:
?:
) vs. traditional if-else statement with concatenation.Pros and Cons of each approach:
Other considerations:
cacheName
).Library and syntax
There is no library being used in this benchmark, only built-in JavaScript features.
Special JS feature/syntax
The ternary conditional operator (?:
) is a special syntax introduced in ECMAScript 1999 (ES-3). It's a concise way to express simple conditional statements. However, its usage and performance vary across browsers and versions.
Alternatives
If you're interested in exploring alternative approaches, consider:
lodash
or underscore
, which provide more expressive and efficient ways to handle conditional logic.Keep in mind that optimizations should always be done with careful consideration of code readability, maintainability, and performance trade-offs.