⚡ Live Sandbox: AI Dev Tool: BtrfsZFSbcachefs under workloads classic

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```rust
//! AI Dev Tool: Edge Function File System Benchmark
//!
//! This code provides a production-ready developer asset for benchmarking file systems under various workloads.
//! It utilizes the Rust programming language and WebAssembly for edge function deployment.
//!
//! Supported file systems: Btrfs, ZFS, bcachefs

use std::fs;
use std::path::Path;
use std::time::Instant;
use wasm_bindgen::prelude::*;

// Define a struct to hold benchmark results
#[derive(Debug, Serialize, Deserialize)]
struct BenchmarkResult {
    file_system: String,
    write_speed: f64,
    read_speed: f64,
}

// Define an enum for supported file systems
#[derive(Debug, Serialize, Deserialize)]
enum FileSystem {
    Btrfs,
    Zfs,
    Bcachefs,
}

// Implement a function to benchmark file system write speed
async fn benchmark_write(file_system: FileSystem, path: &str) -> f64 {
    // Create a test file
    let file_path = format!("{}/test_file", path);
    let mut file = fs::File::create(&file_path).unwrap();

// Measure the time it takes to write 1GB of data
    let start = Instant::now

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