为什么使用github.com/chai2010/webp的decode性能只有golang.org/x/image/webp的一半？是我使用方式不对吗？

[liaosimin-heygen]

`import (
"fmt"
"image"
"os"
"time"
"bytes"

    //"golang.org/x/image/webp"
    "github.com/chai2010/webp"

)

func webpToYuv(imgpath string) *image.Image {
defer timeCost("webpToYuv:", time.Now())

    // 打开WebP文件
    start := time.Now()
    data,err:=os.ReadFile(imgpath)
    if err != nil {
            fmt.Println("open webp file failed:", err)
            return nil
    }
    fmt.Printf("读取文件 %s 耗时：%s\n", imgpath, time.Since(start))

    // 解码WebP文件
    start2 := time.Now()
    result, err := webp.Decode(bytes.NewReader(data))
    if err != nil {
            fmt.Println("decode webp file failed:", err)
            return nil
    }
    fmt.Printf("解码文件 %s 耗时：%s\n", imgpath, time.Since(start2))

    return &result

}
`
使用golang.org/x/image/webp的结果：
webpToYuv: took 51.727646ms
读取文件 /mnt/realtime/josh_lite3_20230714/rgb/cluster_1/00814.webp 耗时：8.154499ms
解码文件 /mnt/realtime/josh_lite3_20230714/rgb/cluster_1/00814.webp 耗时：44.984073ms

使用github.com/chai2010/webp的结果：
webpToYuv: took 105.325294ms
读取文件 /mnt/realtime/josh_lite3_20230714/rgb/cluster_1/00797.webp 耗时：1.161915ms
解码文件 /mnt/realtime/josh_lite3_20230714/rgb/cluster_1/00797.webp 耗时：99.458595ms