object = ['data'];
proxy = new Proxy(object, {})
proxyWithHandler = new Proxy(object, {
get(target, prop, receiver) {
return Reflect.get(target, prop, receiver)
}
})
proxyWithHandler2 = new Proxy(object, {
get(target, prop, receiver) {
return target[prop]
}
})
object[0];
proxy[0]
proxyWithHandler[0]
proxyWithHandler2[0]
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Array access | |
Proxy access | |
Proxy with reflect handler | |
Proxy with handler |
Test name | Executions per second |
---|---|
Array access | 59278932.0 Ops/sec |
Proxy access | 6528805.0 Ops/sec |
Proxy with reflect handler | 2841743.0 Ops/sec |
Proxy with handler | 4109225.8 Ops/sec |
The benchmark you provided compares the performance of accessing data in a basic JavaScript array versus accessing data through different types of JavaScript proxies. Below is a detailed analysis of what is tested, the approaches compared, their pros and cons, and other considerations.
Array Access
object[0];
Proxy Access
proxy[0];
Proxy with Reflect Handler
proxyWithHandler[0];
Reflect
API to delegate to the target object's original property access.Proxy with Custom Handler
proxyWithHandler2[0];
The results indicate the number of executions per second for each test case:
Reflect
API, allowing you to maintain proper access behavior while providing more features.Reflect
methods; making it the slowest option in this benchmark.Direct Object Access: Similar to array access; directly access the properties of a standard object without proxies. This is the fastest method when you don't need dynamic behavior.
Functional Programming Approaches: For managing state or data access, consider using functional paradigms, such as pure functions and immutability, which can mitigate some of the issues with side effects in stateful operations.
Using Observables or Data Proxies: Libraries like MobX or Vue.js' reactivity system provide mechanisms to track and reactively update data, often using proxies under the hood, which can provide enhanced capabilities (e.g., automatically triggering UI updates) but come with similar performance considerations.
In summary, the benchmark provides valuable insights into the trade-offs between performance and flexibility in accessing data using JavaScript arrays and proxies. Understanding these dynamics can help developers choose the right approach based on their application’s needs.