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perf: enable TCP keep-alive for local compute HTTP requests

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When controller and compute share the same process, every HTTP request
to localhost was paying a full TCP handshake (force_close=True forced
connection teardown after each request).  With 2500+ links each sending
two NIO POSTs, that's 5000 SYN->SYN-ACK->ACK cycles even for sub-ms
in-memory handlers.  Switch to keep-alive for loopback compute
(127.0.0.1 / ::1 / localhost) while keeping force_close for remote
computes that may sit behind NAT/firewalls that drop idle connections.
This commit is contained in:
YueGuobin 2026-08-10 23:00:59 +08:00
parent 82fc7f2bd1
commit 506b0b9f4a
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1 changed files with 7 additions and 1 deletions
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gns3server/controller/compute.py
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@ -102,7 +102,13 @@ class Compute:
def _session(self):
if self._http_session is None or self._http_session.closed is True:
connector = aiohttp.TCPConnector(force_close=True, ssl_context=self._ssl_context)
# Reuse TCP keep-alive for local compute (loopback) to avoid paying
# a TCP handshake on every HTTP request; force-close for remote
# computes in case intermediate firewalls/NATs drop idle connections.
_local = self._host in ("127.0.0.1", "::1", "localhost")
connector = aiohttp.TCPConnector(
force_close=not _local, ssl_context=self._ssl_context
)
self._http_session = aiohttp.ClientSession(connector=connector)
return self._http_session