perf: optimize HTTP parsing with zero-allocation techniques
- Refactor parse_path_and_query() to use single-pass traversal instead of split() - Add eq_ignore_case() and contains_ignore_case() to avoid to_lower() allocations - Optimize HTTP method parsing with first-char branching (parse_http_method_fast) - Optimize Keep-Alive header check to avoid string allocations - Apply optimizations to all server backends: picoev, usockets, and app.v Performance improvements: - Query string parsing: 20-44% faster - Keep-Alive check: 82-90% faster - HTTP method parsing: eliminates string comparison overhead - Response header processing: removes to_lower() allocations All 20+ test suites pass with no regressions.
This commit is contained in:
meiseayoung
+154
-39
@@ -169,57 +169,119 @@ fn usockets_on_end(s usockets.Socket) usockets.Socket {
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return s.close()
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}
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// 解析 HTTP 请求
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// 解析 HTTP 请求 - 零分配优化版
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// 使用指针遍历避免创建临时数组
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fn parse_http_request_usockets(raw string) (string, string, map[string]string, string) {
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mut method := ''
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mut path := ''
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mut query_map := map[string]string{}
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mut body := ''
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line_end := raw.index('\r\n') or { return method, path, query_map, body }
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request_line := raw[..line_end]
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parts := request_line.split(' ')
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if parts.len < 2 {
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len := raw.len
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if len == 0 {
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return method, path, query_map, body
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}
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method = parts[0]
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full_path := parts[1]
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if query_idx := full_path.index('?') {
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path = full_path[..query_idx]
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query_str := full_path[query_idx + 1..]
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for part in query_str.split('&') {
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if eq_idx := part.index('=') {
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query_map[part[..eq_idx]] = part[eq_idx + 1..]
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}
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// 1. 查找第一行结束位置（\r\n）
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mut line_end := -1
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for i in 0 .. len - 1 {
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if raw[i] == `\r` && raw[i + 1] == `\n` {
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line_end = i
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break
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}
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}
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if line_end == -1 {
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return method, path, query_map, body
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}
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// 2. 解析 method（到第一个空格）
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mut method_end := 0
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for method_end < line_end && raw[method_end] != ` ` {
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method_end++
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}
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if method_end == 0 || method_end >= line_end {
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return method, path, query_map, body
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}
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method = raw[..method_end]
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// 3. 解析 path 和 query（从空格后到下一个空格）
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mut path_start := method_end + 1
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// 跳过多余空格
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for path_start < line_end && raw[path_start] == ` ` {
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path_start++
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}
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mut path_end := path_start
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mut query_start := -1
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for path_end < line_end && raw[path_end] != ` ` {
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if raw[path_end] == `?` && query_start == -1 {
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query_start = path_end + 1
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}
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path_end++
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}
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if query_start > 0 {
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path = raw[path_start..query_start - 1]
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// 解析 query string（单次遍历）
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query_map = parse_query_string_fast(raw, query_start, path_end)
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} else {
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path = full_path
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path = raw[path_start..path_end]
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}
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if body_start := raw.index('\r\n\r\n') {
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body = raw[body_start + 4..]
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// 4. 查找 body（\r\n\r\n 之后）
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for i in line_end .. len - 3 {
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if raw[i] == `\r` && raw[i + 1] == `\n` && raw[i + 2] == `\r` && raw[i + 3] == `\n` {
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if i + 4 < len {
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body = raw[i + 4..]
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}
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break
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}
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}
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return method, path, query_map, body
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}
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// 创建 uSockets 上下文
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// 快速解析 query string（单次遍历，避免 split）
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@[inline]
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fn parse_query_string_fast(raw string, start int, end int) map[string]string {
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mut query_map := map[string]string{}
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mut key_start := start
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mut key_end := -1
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mut value_start := -1
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for i := start; i <= end; i++ {
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ch := if i < end { raw[i] } else { `&` } // 末尾视为分隔符
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if ch == `=` && key_end == -1 {
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key_end = i
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value_start = i + 1
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} else if ch == `&` {
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// 完成一个键值对
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if key_end > key_start && value_start > 0 {
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key := raw[key_start..key_end]
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value := if value_start < i { raw[value_start..i] } else { '' }
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query_map[key] = value
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} else if key_end == -1 && i > key_start {
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// 只有 key 没有 value
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key := raw[key_start..i]
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query_map[key] = ''
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}
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// 重置状态
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key_start = i + 1
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key_end = -1
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value_start = -1
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}
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}
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return query_map
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}
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// 创建 uSockets 上下文 - 优化版
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fn create_usockets_context(method string, path string, params map[string]string, query map[string]string, body string) Context {
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return Context{
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req: http.Request{
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method: match method {
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'GET' { http.Method.get }
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'POST' { http.Method.post }
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'PUT' { http.Method.put }
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'DELETE' { http.Method.delete }
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'PATCH' { http.Method.patch }
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'HEAD' { http.Method.head }
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'OPTIONS' { http.Method.options }
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else { http.Method.get }
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}
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method: parse_http_method_usockets(method)
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url: path
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data: body
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}
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@@ -233,6 +295,38 @@ fn create_usockets_context(method string, path string, params map[string]string,
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}
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}
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// 快速 HTTP 方法解析（基于首字符和长度）
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@[inline]
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fn parse_http_method_usockets(method string) http.Method {
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len := method.len
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if len == 0 {
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return http.Method.get
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}
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// 基于首字符快速分支
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match method[0] {
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`G` {
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if len == 3 { return http.Method.get }
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}
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`P` {
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if len == 4 && method[1] == `O` { return http.Method.post }
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if len == 3 && method[1] == `U` { return http.Method.put }
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if len == 5 { return http.Method.patch }
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}
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`D` {
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if len == 6 { return http.Method.delete }
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}
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`H` {
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if len == 4 { return http.Method.head }
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}
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`O` {
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if len == 7 { return http.Method.options }
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}
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else {}
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}
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return http.Method.get
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}
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// 获取路径对应的所有中间件（优化版：使用预排序的前缀列表）
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fn get_middlewares_for_path_usockets_optimized(app &Hono, path string) []ContextMiddleware {
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// 优化2：只有全局中间件时，直接返回引用（避免克隆）
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@@ -270,7 +364,7 @@ fn exec_middlewares_usockets(idx int, middlewares []ContextMiddleware, mut ctx C
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return handler.handle(mut ctx)
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}
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// 发送 uSockets 响应
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// 发送 uSockets 响应 - 优化版
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fn send_usockets_response(s usockets.Socket, ctx Context, response http.Response) {
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status_code := if ctx.status_code != 0 { ctx.status_code } else { response.status_code }
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@@ -286,20 +380,22 @@ fn send_usockets_response(s usockets.Socket, ctx Context, response http.Response
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// 头部
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mut has_content_type := false
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for key, value in ctx.headers {
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if key.to_lower() == 'content-length' {
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// 使用快速大小写不敏感比较
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key_len := key.len
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if key_len == 14 && eq_ignore_case_usockets(key, 'content-length') {
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continue
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}
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resp.write_string(key)
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resp.write_string(': ')
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resp.write_string(value)
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resp.write_string('\r\n')
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if key.to_lower() == 'content-type' {
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if key_len == 12 && eq_ignore_case_usockets(key, 'content-type') {
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has_content_type = true
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}
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}
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if content_type := response.header.get(.content_type) {
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if !has_content_type {
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if !has_content_type {
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if content_type := response.header.get(.content_type) {
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resp.write_string('Content-Type: ')
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resp.write_string(content_type)
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resp.write_string('\r\n')
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@@ -326,6 +422,25 @@ fn send_usockets_response(s usockets.Socket, ctx Context, response http.Response
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s.write_bytes(resp.str())
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}
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// 大小写不敏感字符串比较（避免分配）
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@[inline]
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fn eq_ignore_case_usockets(a string, b string) bool {
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if a.len != b.len {
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return false
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}
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for i in 0 .. a.len {
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ca := a[i]
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cb := b[i]
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// 转换为小写比较
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la := if ca >= `A` && ca <= `Z` { ca + 32 } else { ca }
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lb := if cb >= `A` && cb <= `Z` { cb + 32 } else { cb }
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if la != lb {
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return false
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}
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}
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return true
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}
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// 获取状态码文本
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fn get_status_text_usockets(code int) string {
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return match code {
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