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author | Phil Sutter <phil@nwl.cc> | 2022-03-01 19:46:21 +0100 |
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committer | Phil Sutter <phil@nwl.cc> | 2022-03-10 17:38:31 +0100 |
commit | 07ee529f5a62838d68be59683be99bf6a7cda0f2 (patch) | |
tree | 60454796d86f28ecdc76ce10656de049af73c2b7 /libxtables | |
parent | b5f2faea325a315bfb932ebc634f3298d4824cae (diff) |
nft: Speed up immediate parsing
Parsing of rules which jump to a chain pointlessly causes a call to
xtables_find_target() despite the code already knowing the outcome.
Avoid the significant delay for rulesets with many chain jumps by
performing the (standard) target lookup only for accept/drop/return
verdicts.
From a biased test-case on my VM:
| # iptables-nft-save | grep -c -- '-j'
| 133943
| # time ./old/iptables-nft-save >/dev/null
| real 0m45.566s
| user 0m1.308s
| sys 0m8.430s
| # time ./new/iptables-nft-save >/dev/null
| real 0m3.547s
| user 0m0.762s
| sys 0m2.476s
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'libxtables')
0 files changed, 0 insertions, 0 deletions