amberjs 1.17.0

// 启动时间基准测试
// Stage 31.3: 性能基准测试完善
//
// 该模块提供启动时间相关的基准测试，包括：
// - 冷启动时间测试
// - 热启动时间测试
// - V8 初始化时间测试
// - Runtime 初始化时间测试

use crate::benchmarks::{BenchmarkConfig, BenchmarkFramework, BenchmarkResult, MetricType};
use rusty_v8::Isolate;
use std::time::{Duration, Instant};
/// 启动时间基准测试套件
pub struct StartupBenchmark;
impl StartupBenchmark {
    /// 创建新的启动时间基准测试套件
    pub fn new() -> Self {
        Self
    }
    /// 冷启动时间测试
    pub fn cold_start_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 100,
            warmup_iterations: 5,
            timeout: Some(Duration::from_secs(30)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark("cold_start", MetricType::StartupTime, || {
            // 模拟冷启动 - 创建新的 Runtime
            let _runtime: _ = crate::Runtime::new(1024, 1024, false, false);
        })
    }
    /// 热启动时间测试
    pub fn warm_start_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 1000,
            warmup_iterations: 10,
            timeout: Some(Duration::from_secs(30)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark("warm_start", MetricType::StartupTime, || {
            // 模拟热启动 - 使用现有 Runtime
            let runtime: _ = crate::Runtime::new(1024, 1024, false, false);
            let _: _ = runtime;
        })
    }
    /// V8 初始化时间测试
    pub fn v8_init_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 500,
            warmup_iterations: 10,
            timeout: Some(Duration::from_secs(30)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark("v8_init", MetricType::StartupTime, || {
            // 模拟 V8 初始化
            let _isolate: _ = Isolate::new(Default::default());
        })
    }
    /// CLI 解析时间测试
    pub fn cli_parsing_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 1000,
            warmup_iterations: 10,
            timeout: Some(Duration::from_secs(30)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark("cli_parsing", MetricType::StartupTime, || {
            // 模拟 CLI 参数解析
            let args: _ = vec![
                "amber".to_string(),
                "--eval".to_string(),
                "console.log('test')".to_string(),
            ];
            let _len: _ = args.len();
            _len
        })
    }
    /// 模块加载时间测试
    pub fn module_loading_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 100,
            warmup_iterations: 5,
            timeout: Some(Duration::from_secs(30)),
            save_raw_data: true,
            compare_with_baseline: true,
        };
        let framework: _ = BenchmarkFramework::new(config);
        framework.run_benchmark("module_loading", MetricType::StartupTime, || {
            // 模拟模块加载
            let mut modules = std::collections::HashMap::new();
            modules.insert("test", "module");
            modules
        })
    }
    /// 完整启动流程测试
    pub fn full_startup_benchmark(&self) -> BenchmarkResult {
        let config: _ = BenchmarkConfig {
            iterations: 50,
            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("full_startup", MetricType::StartupTime, || {
            // 模拟完整启动流程
            let start: _ = Instant::now();
            // 1. 初始化 V8
            let _isolate: _ = Isolate::new(Default::default());
            // 2. 创建 Runtime
            let _runtime: _ = crate::Runtime::new(1024, 1024, false, false);
            let _elapsed: _ = start.elapsed();
            _elapsed
        })
    }
    /// 运行所有启动时间基准测试
    pub fn run_all_benchmarks(&self) -> Vec<BenchmarkResult> {
        vec![
            self.cold_start_benchmark(),
            self.warm_start_benchmark(),
            self.v8_init_benchmark(),
            self.cli_parsing_benchmark(),
            self.module_loading_benchmark(),
            self.full_startup_benchmark(),
        ]
    }
    /// 生成启动时间性能报告
    pub fn generate_report(&self, results: &[BenchmarkResult]) -> String {
        let mut report = String::new();
        report.push_str("=== Startup Time Performance Report ===\n\n");
        for result in results {
            report.push_str(&result.format_summary());
            report.push_str("\n\n");
        }
        // 统计分析
        let avg_startup_time: _ = results
            .iter()
            .filter(|r| r.metric_type == MetricType::StartupTime)
            .map(|r| r.avg_duration.as_secs_f64() * 1_000_000.0) // 转换为微秒
            .sum::<f64>()
            / results.len() as f64;
        report.push_str(&format!(
            "Average Startup Time: {:.2}μs\n",
            avg_startup_time
        ));
        report
    }
}
impl Default for StartupBenchmark {
    fn default() -> Self {
        Self::new()
    }
}
/// 启动时间优化建议
pub struct StartupOptimizationSuggestions {
    pub suggestions: Vec<String>,
}
impl StartupOptimizationSuggestions {
    /// 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 {
            match result.name.as_str() {
                "cold_start" => {
                    if result.avg_duration.as_millis() > 10 {
                        suggestions.push(
                            "Cold start time is high. Consider implementing lazy loading for non-critical components.".to_string()
                        );
                    }
                }
                "v8_init" => {
                    if result.avg_duration.as_millis() > 5 {
                        suggestions.push(
                            "V8 initialization is slow. Consider using V8 snapshots to speed up startup.".to_string()
                        );
                    }
                }
                "cli_parsing" => {
                    if result.avg_duration.as_millis() > 1 {
                        suggestions.push(
                            "CLI parsing overhead detected. Consider optimizing argument parsing logic.".to_string()
                        );
                    }
                }
                _ => {}
            }
        }
        // 通用建议
        if results.iter().any(|r| r.avg_duration.as_millis() > 10) {
            suggestions.push(
                "Overall startup time is high. Consider implementing a faster startup path for simple scripts.".to_string()
            );
        }
        Self { suggestions }
    }
    /// 格式化优化建议
    pub fn format(&self) -> String {
        if self.suggestions.is_empty() {
            "No optimization suggestions. Startup time is within acceptable limits.".to_string()
        } else {
            format!(
                "=== Startup Optimization Suggestions ===\n\n{}",
                self.suggestions
                    .iter()
                    .enumerate()
                    .map(|(i, s)| format!("{}. {}", i + 1, s))
                    .collect::<Vec<_>>()
                    .join("\n")
            )
        }
    }
}