`app.use(handle)`,When I don't add the prefix path `/admin/*`, `/admin` in `withBase` does not take effect

[donywan]

Environment

package.json

"h3-nightly": "2.0.0-20250218-184950-b59fd5f",

Reproduction

donywan/h3-template

Describe the bug

server.use(withBase('/admin', adminRoutes));

http://localhost:3000/user is work and http://localhost:3000/admin/user also is work.

Additional context

No response

Logs

[gulshan]

Try using-

server.use("/admin/**", useBase("/admin", adminRoutes.handler))

[donywan]

Try using-

server.use("/admin/**", useBase("/admin", adminRoutes.handler))

Well,you are right,but what is mean of path /admin/**?

[donywan]

D:\dev>bombardier-windows-amd64.exe -c 2000 -n 2000000 http://localhost:3000/admin/user
Bombarding http://localhost:3000/admin/user with 2000000 request(s) using 2000 connection(s)
 2000000 / 2000000 [============================================================================] 100.00% 18073/s 1m50s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec     18125.34    2662.37   28404.67
  Latency      110.42ms    14.44ms      1.29s
  HTTP codes:
    1xx - 0, 2xx - 2000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     3.82MB/s

D:\dev>bombardier-windows-amd64.exe -c 2000 -n 2000000 http://localhost:3000
Bombarding http://localhost:3000 with 2000000 request(s) using 2000 connection(s)
 2000000 / 2000000 [============================================================================] 100.00% 22582/s 1m28s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec     22603.48    2014.03   26856.62
  Latency       88.49ms    14.50ms      1.55s
  HTTP codes:
    1xx - 0, 2xx - 2000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     4.50MB/s

Nested routing has poor performance on bun.