mirror of
https://gitcode.com/JianFeeeee/HomeAgent.git
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304cad0648
- docs/zh/架构迁移评估.md: C ABI→子进程+共享内存完整迁移论证(1621行) - docs/zh/experiments/: 18项可复跑可行性实验(架构评估的所有数字来源) - plan.md §11: 11.1~11.9 插件架构缺陷修复清单(唯一权威编号) - main 保持干净,本批次为 update 特性分支的整改起点
50 lines
1.8 KiB
Go
50 lines
1.8 KiB
Go
//go:build ignore
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package main
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"time"
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"golang.org/x/sys/unix"
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)
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func main() {
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fmt.Println("=== 实验 10：多媒体 payload —— 共享内存零拷贝 vs JSON base64 ===")
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sizes := []int{100 * 1024, 1024 * 1024, 5 * 1024 * 1024}
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for _, sz := range sizes {
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img := make([]byte, sz)
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for i := range img { img[i] = byte(i % 251) }
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// A. JSON + base64（当前 ContentBlock 的做法）
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t0 := time.Now()
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b64 := base64.StdEncoding.EncodeToString(img)
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blob, _ := json.Marshal(map[string]string{"type": "image_url", "url": "data:image/png;base64," + b64})
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var back map[string]string
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json.Unmarshal(blob, &back)
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dec, _ := base64.StdEncoding.DecodeString(back["url"][22:])
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jsonDur := time.Since(t0)
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// B. 共享内存 arena（写入 + 偏移解引用，零拷贝读）
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mfd, _ := unix.MemfdCreate("arena", 0)
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unix.Ftruncate(mfd, int64(sz+4096))
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data, _ := unix.Mmap(mfd, 0, sz+4096, unix.PROT_READ|unix.PROT_WRITE, unix.MAP_SHARED)
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t0 = time.Now()
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copy(data[4096:], img) // 写 arena
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view := data[4096 : 4096+sz] // 偏移解引用 = 零拷贝切片
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_ = view[sz-1]
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shmDur := time.Since(t0)
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unix.Munmap(data)
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unix.Close(mfd)
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fmt.Printf("\n%s payload:\n", map[int]string{100*1024:"100KB", 1024*1024:"1MB", 5*1024*1024:"5MB"}[sz])
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fmt.Printf(" A JSON+base64: %8v 传输体积 %d B (+%.0f%%) 解出 %d B %s\n",
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jsonDur, len(blob), float64(len(blob)-sz)/float64(sz)*100, len(dec),
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map[bool]string{true:"✓",false:"✗"}[len(dec)==sz])
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fmt.Printf(" B 共享内存: %8v 传输体积 8 B (描述符) 零拷贝视图 %d B\n", shmDur, len(view))
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fmt.Printf(" → 加速 %.0fx, 体积节省 %.0f%%\n",
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float64(jsonDur)/float64(shmDur), float64(len(blob)-8)/float64(len(blob))*100)
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}
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}
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