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Access to Proxy chain
(version: 0)
Comparing performance of:
Object access vs Proxy access vs Proxy access 2 layer vs Proxy access 3 layer
Created:
3 years ago
by:
Guest
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Script Preparation code:
object = { value: 'data' }; proxy1 = new Proxy(object, {}) proxy2 = new Proxy(new Proxy(object, {}), {} ) proxy3 = new Proxy( new Proxy(new Proxy(object, {}), {} ), {})
Tests:
Object access
object.value;
Proxy access
proxy1.value
Proxy access 2 layer
proxy2.value
Proxy access 3 layer
proxy3.value
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
Object access
Proxy access
Proxy access 2 layer
Proxy access 3 layer
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 benchmark JSON and explain what is being tested. **Benchmark Definition** The benchmark definition represents a JavaScript microbenchmark that measures the performance of accessing an object through different proxy layers. The script preparation code creates three proxies: `proxy1`, `proxy2`, and `proxy3`. Each proxy has one or more objects nested inside it, with the value "data" at the top level. **Test Cases** The benchmark defines four test cases: 1. **Object access**: Accessing `object.value`. 2. **Proxy access**: Accessing `proxy1.value`. 3. **Proxy access 2 layer**: Accessing `proxy2.value` (i.e., accessing the nested object through another proxy). 4. **Proxy access 3 layer**: Accessing `proxy3.value` (i.e., accessing the deepest nested object through multiple proxies). **Options Compared** The benchmark compares the execution times for each test case: * Directly accessing the innermost object (`object.value`) * Accessing an intermediate proxy (`proxy1.value`) * Accessing a proxy that itself accesses another proxy (`proxy2.value`) * Accessing a proxy that accesses two intermediate proxies (`proxy3.value`) **Pros and Cons** The choice of approach depends on the specific use case. Here are some general pros and cons: * Direct access to `object.value`: Fast, but might be less efficient in terms of memory management. * Using an intermediate proxy: Can provide additional benefits like caching or logging, but might introduce overhead due to the extra layer of indirection. * Accessing multiple proxies: May lead to increased overhead due to the repeated traversal of nested objects. **Library and Purpose** The `Proxy` object is a built-in JavaScript constructor that creates a proxy object. A proxy object can intercept and manipulate access to its target object's properties, allowing for features like: * Caching * Logging * Validation In this benchmark, the proxies are used to demonstrate the performance implications of traversing nested objects. **Special JS Feature or Syntax** This benchmark does not use any special JavaScript features or syntax. It only relies on standard JavaScript constructs, including `Proxy` and object literals. **Alternatives** Other alternatives for measuring browser performance might include: * V8's `perf` API: Provides a low-level interface for benchmarking and profiling JavaScript code. * WebAssembly: Allows for benchmarking the performance of compiled JavaScript code in a more efficient way. * CPU-bound benchmarks: Measure the execution time of computationally intensive tasks, like matrix multiplication or encryption. For measuring browser-specific performance, alternatives might include: * Browser's built-in benchmarking tools (e.g., Chrome DevTools' Benchmarking tool) * Third-party benchmarking libraries (e.g., `benchmark`) Keep in mind that the choice of alternative depends on the specific use case and requirements.
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Access to Proxy vs Object - without reflect
Access to Proxy vs Object2
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Access to Proxy without Reflect, vs Object
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