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120273d7f6
I noticed portlist when looking at some profiles and hadn't looked at the code much before. This is a first pass over it. It allocates a fair bit. More love remains, but this does a bit: name old time/op new time/op delta GetList-8 9.92ms ± 8% 9.64ms ±12% ~ (p=0.247 n=10+10) name old alloc/op new alloc/op delta GetList-8 931kB ± 0% 869kB ± 0% -6.70% (p=0.000 n=10+10) name old allocs/op new allocs/op delta GetList-8 4.59k ± 0% 3.69k ± 1% -19.71% (p=0.000 n=10+10) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
23 lines
578 B
Go
23 lines
578 B
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !linux,!windows,!darwin
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package portlist
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import "time"
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// We have to run netstat, which is a bit expensive, so don't do it too often.
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const pollInterval = 5 * time.Second
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func listPorts() (List, error) {
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return listPortsNetstat("-na")
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}
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func addProcesses(pl []Port) ([]Port, error) {
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// Generic version has no way to get process mappings.
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// This has to be OS-specific.
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return pl, nil
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}
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