amberjs 1.16.1

JavaScript/TypeScript runtime built with Rust and V8
Documentation 
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// 内存使用基准测试
// Stage 31.3: 性能基准测试完善
//
// 该模块提供内存使用相关的基准测试，包括：
// - 内存分配性能测试
// - 内存使用量测试
// - 内存泄漏检测
// - 垃圾回收性能测试

use std::sync::{Arc, Mutex};

use crate::benchmarks::{BenchmarkConfig, BenchmarkFramework, BenchmarkResult, MetricType};
use std::time::Duration;
use tokio::task;
/// 内存使用基准测试套件
pub struct MemoryBenchmark;
impl MemoryBenchmark {
    /// 创建新的内存使用基准测试套件
    pub fn new() -> Self {
        Self
    }
    /// 内存分配性能测试
    pub fn allocation_performance_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 1000,
            warmup_iterations: 10,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory(
            "allocation_performance",
            MetricType::MemoryUsage,
            || {
                // 模拟内存分配
                let mut vec = Vec::new();
                for i in 0..1000 {
                    vec.push(i);
                }
                vec
            },
        )
    }
    /// 大对象分配测试
    pub fn large_object_allocation_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 100,
            warmup_iterations: 5,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory(
            "large_object_allocation",
            MetricType::MemoryUsage,
            || {
                // 模拟大对象分配
                let mut map = std::collections::HashMap::new();
                for i in 0..10000 {
                    map.insert(format!("key_{}", i), format!("value_{}", i));
                }
                map
            },
        )
    }
    /// 内存碎片化测试
    pub fn memory_fragmentation_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 100,
            warmup_iterations: 5,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory("memory_fragmentation", MetricType::MemoryUsage, || {
            // 模拟内存碎片化
            let mut allocations = Vec::new();
            for i in 0..1000 {
                let size: _ = (i % 10 + 1) * 1024;
                allocations.push(vec![0u8; size]);
            }
            // 释放部分内存
            allocations.drain(0..500);
            allocations
        })
    }
    /// 内存池性能测试
    pub fn memory_pool_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 1000,
            warmup_iterations: 10,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory("memory_pool", MetricType::MemoryUsage, || {
            // 模拟内存池使用
            let pool: _ = Arc::new(Mutex::new(Vec::<u8>::new()));
            for _ in 0..100 {
                let guard: _ = pool.lock().unwrap();
                // 保持锁一小段时间来模拟实际使用
                drop(std::hint::black_box(guard));
            }
        })
    }
    /// 字符串内存使用测试
    pub fn string_memory_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 1000,
            warmup_iterations: 10,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory("string_memory", MetricType::MemoryUsage, || {
            // 模拟字符串内存使用
            let mut strings = Vec::new();
            for i in 0..1000 {
                strings.push(format!("This is a long string with number {}", i));
            }
            strings
        })
    }
    /// 递归数据结构内存测试
    pub fn recursive_data_structure_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 100,
            warmup_iterations: 5,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory(
            "recursive_data_structure",
            MetricType::MemoryUsage,
            || {
                // 模拟递归数据结构
                let mut tree = Vec::new();
                for i in 0..1000 {
                    tree.push(Node {
                        value: i,
                        children: vec![
                            Node {
                                value: i * 2,
                                children: vec![],
                            },
                            Node {
                                value: i * 2 + 1,
                                children: vec![],
                            },
                        ],
                    });
                }
                let checksum: i32 = tree.iter().map(Node::total_value).sum();
                let _ = std::hint::black_box(checksum);
                tree
            },
        )
    }
    /// 异步内存使用测试
    pub fn async_memory_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 100,
            warmup_iterations: 5,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory("async_memory", MetricType::MemoryUsage, || {
            // 模拟异步内存使用
            task::block_in_place(|| {
                let mut data = Vec::new();
                for i in 0..1000 {
                    data.push(i * 2);
                }
                data
            })
        })
    }
    /// 内存泄漏检测测试
    pub fn memory_leak_detection_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 10,
            warmup_iterations: 2,
            timeout: Some(Duration::from_secs(60)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark_with_memory(
            "memory_leak_detection",
            MetricType::MemoryUsage,
            || {
                // 模拟内存泄漏检测
                let before: _ = get_current_memory();
                {
                    let _leaked: _ = Box::into_raw(Box::new(vec![0u8; 1000000]));
                    // 注意：故意不释放，以测试泄漏检测
                }
                let after: _ = get_current_memory();
                (after - before) as i64
            },
        )
    }
    /// 运行所有内存使用基准测试
    pub fn run_all_benchmarks(&self) -> Vec<BenchmarkResult> {
        vec![
            self.allocation_performance_benchmark(),
            self.large_object_allocation_benchmark(),
            self.memory_fragmentation_benchmark(),
            self.memory_pool_benchmark(),
            self.string_memory_benchmark(),
            self.recursive_data_structure_benchmark(),
            self.async_memory_benchmark(),
            self.memory_leak_detection_benchmark(),
        ]
    }
    /// 生成内存使用性能报告
    pub fn generate_report(&self, results: &[BenchmarkResult]) -> String {
        let mut report = String::new();
        report.push_str("=== Memory Usage Performance Report ===\n\n");
        for result in results {
            report.push_str(&result.format_summary());
            report.push_str("\n\n");
        }
        // 统计分析
        let total_memory: _ = results
            .iter()
            .filter_map(|r| r.memory_stats.as_ref())
            .map(|stats| stats.current_rss)
            .sum::<usize>();
        let avg_memory: _ = if !results.is_empty() {
            total_memory / results.len()
        } else {
            0
        };
        report.push_str(&format!("Total Memory Usage: {} bytes\n", total_memory));
        report.push_str(&format!("Average Memory Usage: {} bytes\n", avg_memory));
        report
    }
}
impl Default for MemoryBenchmark {
    fn default() -> Self {
        Self::new()
    }
}
// 辅助数据结构
#[derive(Debug, Clone)]
struct Node {
    value: i32,
    children: Vec<Node>,
}

impl Node {
    fn total_value(&self) -> i32 {
        self.value + self.children.iter().map(Self::total_value).sum::<i32>()
    }
}
/// 获取当前内存使用量（简化实现）
fn get_current_memory() -> usize {
    // 简化实现 - 在实际应用中会使用平台特定的 API
    0
}
/// 内存使用优化建议
pub struct MemoryOptimizationSuggestions {
    pub suggestions: Vec<String>,
}
impl MemoryOptimizationSuggestions {
    /// 基于基准测试结果生成优化建议
    pub fn generate(results: &[BenchmarkResult]) -> Self {
        let mut suggestions = Vec::new();
        for result in results {
            if let Some(stats) = &result.memory_stats {
                match result.name.as_str() {
                    "allocation_performance" => {
                        if stats.heap_allocated > 1000000 {
                            suggestions.push(
                                "High heap allocation detected. Consider using object pooling."
                                    .to_string(),
                            );
                        }
                    }
                    "memory_fragmentation" => {
                        suggestions.push(
                            "Memory fragmentation detected. Consider implementing memory defragmentation.".to_string()
                        );
                    }
                    "memory_leak_detection" => {
                        suggestions.push(
                            "Memory leak detected. Review memory management and ensure proper cleanup.".to_string()
                        );
                    }
                    _ => {}
                }
            }
        }
        // 通用建议
        let avg_memory: usize = results
            .iter()
            .filter_map(|r| r.memory_stats.as_ref())
            .map(|stats| stats.current_rss)
            .sum::<usize>()
            / results.len().max(1);
        if avg_memory > 10000000 {
            suggestions.push(
                "Overall memory usage is high. Consider implementing more aggressive memory optimization strategies.".to_string()
            );
        }
        Self { suggestions }
    }
    /// 格式化优化建议
    pub fn format(&self) -> String {
        if self.suggestions.is_empty() {
            "No optimization suggestions. Memory usage is within acceptable limits.".to_string()
        } else {
            format!(
                "=== Memory Optimization Suggestions ===\n\n{}",
                self.suggestions
                    .iter()
                    .enumerate()
                    .map(|(i, s)| format!("{}. {}", i + 1, s))
                    .collect::<Vec<_>>()
                    .join("\n")
            )
        }
    }
}