Golang은 데이터 처리 효율성을 어떻게 향상시키나요?

package main

import (
    "bufio"
    "context"
    "flag"
    "fmt"
    "io"
    "log"
    "os"
    "runtime"
    "strconv"
    "strings"
    "sync"
    "time"
)

var (
    inputFile  string
    numWorkers int
    chunkSize  int
)

func init() {
    flag.StringVar(&inputFile, "input", "", "Path to the input file")
    flag.IntVar(&numWorkers, "workers", runtime.NumCPU(), "Number of workers to spawn")
    flag.IntVar(&chunkSize, "chunk", 1000, "Chunk size for parallel processing")
    flag.Parse()
}

func main() {
    if inputFile == "" {
        log.Fatal("Input file not specified")
    }

    file, err := os.Open(inputFile)
    if err != nil {
        log.Fatalf("Error opening file: %v\n", err)
    }
    defer file.Close()

    // 读取文件行数
    var lineCount int
    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        lineCount++
    }
    if err := scanner.Err(); err != nil {
        log.Fatalf("Error reading file: %v\n", err)
    }
    file.Seek(0, 0) // 重置文件指针

    // 创建 ctx 和 wg 用于协程控制
    ctx := context.Background()
    wg := &sync.WaitGroup{}

    // 创建通道用于每组处理的数据
    chunkChan := make(chan []string, numWorkers)

    // 启动 numWorkers 个协程进行并行处理
    for i := 0; i < numWorkers; i++ {
        wg.Add(1)
        go processChunk(ctx, wg, chunkChan)
    }

    // 按大小分块读取文件并发送到通道
    for start := 0; start < lineCount; start += chunkSize {
        chunk := []string{}
        for i := 0; i < chunkSize && start+i < lineCount; i++ {
            scanner.Scan()
            chunk = append(chunk, scanner.Text())
        }
        chunkChan <- chunk
    }

    close(chunkChan)
    wg.Wait()

    fmt.Println("Data processed")
}

func processChunk(ctx context.Context, wg *sync.WaitGroup, chunkChan <-chan []string) {
    defer wg.Done()

    for chunk := range chunkChan {
        for _, line := range chunk {
            // 对行执行处理逻辑
            // 例如：清洗数据、转换格式等
        }
    }
}