bug: I test apisix performance is significantly poor compared with nginx. Why, Below is my conf

[jiangdongzi]

Current Behavior

http {

upstream backend_servers {
    server 172.27.255.37:81;
    keepalive 16;
}

server {
    listen 9085;
    server_name localhost;

        access_by_lua_block {
           apisix.http_access_phase()
        }

    location / {
        proxy_pass http://backend_servers;  # 或者使用 proxy_pass http://backend_servers$request_uri;
        proxy_set_header Connection "";
        proxy_http_version 1.1;
    }
}

function _M.http_access_phase()
local ngx_ctx = ngx.ctx

if not verify_tls_client(ngx_ctx.api_ctx) then
    return core.response.exit(400)
end

-- always fetch table from the table pool, we don't need a reused api_ctx
local api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx

core.ctx.set_vars_meta(api_ctx)

if true then return end
These code alone decrease qps 13%

Expected Behavior

No response

Error Logs

No response

Steps to Reproduce

just add the conf
upstream backend_servers {
server 172.27.255.37:81;
keepalive 16;
}

server {
    listen 9085;
    server_name localhost;

        access_by_lua_block {
           apisix.http_access_phase()
        }

    location / {
        proxy_pass http://backend_servers;  # 或者使用 proxy_pass http://backend_servers$request_uri;
        proxy_set_header Connection "";
        proxy_http_version 1.1;
    }
}

then change http_access_phase
function _M.http_access_phase()
local ngx_ctx = ngx.ctx

if not verify_tls_client(ngx_ctx.api_ctx) then
    return core.response.exit(400)
end

-- always fetch table from the table pool, we don't need a reused api_ctx
local api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx

core.ctx.set_vars_meta(api_ctx)

if true then return end
and wrk test get qps: 29591.64

ant then move if true then return end just in the entrance of the func
function _M.http_access_phase()
if true then return end
local ngx_ctx = ngx.ctx

if not verify_tls_client(ngx_ctx.api_ctx) then
    return core.response.exit(400)
end

-- always fetch table from the table pool, we don't need a reused api_ctx
local api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx

core.ctx.set_vars_meta(api_ctx)

and wrk test get qps 34175.09

Environment

• APISIX version (run apisix version): any version
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):