refactor: optimize port map to switch statement#24
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mosajjal merged 1 commit intogopacket:masterfrom Sep 10, 2023
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Initializing huge maps as global variables causes a lot of allocations while importing the package (even if the respective feature is never used). Rewrite to use `switch` statements and regen `iana_ports.go`. As observed with `GODEBUG=inittrace=1`: before: ``` init github.com/gopacket/gopacket/layers @0.52 ms, 1.7 ms clock, 395496 bytes, 120 allocs ``` after: ``` init github.com/gopacket/gopacket/layers @1.0 ms, 1.4 ms clock, 27760 bytes, 86 allocs ``` Time can be ignored, but reduction in memory allocation is visible. Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
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This new fork seems to be more active. The change itself doesn't fix any memory allocation, but I submitted a PR for gopacket/gopacket: gopacket/gopacket#24 Also fix crazy alloc in `tui/components` (this is only relevant for `talosctl`). Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
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This new fork seems to be more active. The change itself doesn't fix any memory allocation, but I submitted a PR for gopacket/gopacket: gopacket/gopacket#24 Also fix crazy alloc in `tui/components` (this is only relevant for `talosctl`). Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
Unix4ever
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This new fork seems to be more active. The change itself doesn't fix any memory allocation, but I submitted a PR for gopacket/gopacket: gopacket/gopacket#24 Also fix crazy alloc in `tui/components` (this is only relevant for `talosctl`). Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
This was referenced Jul 31, 2023
mosajjal
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See * siderolabs#7532 * gopacket/gopacket#24 Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
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Initializing huge maps as global variables causes a lot of allocations while importing the package (even if the respective feature is never used).
Rewrite to use
switchstatements and regeniana_ports.go.As observed with
GODEBUG=inittrace=1:before:
after:
Time can be ignored, but reduction in memory allocation is visible.