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perf: remove cpu bottleneck in tr_peerIo::write() (#4258)

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Charles Kerr 2022-11-27 20:46:03 -06:00 committed by GitHub
parent d8327949ac
commit 0efb96124b
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 7 additions and 5 deletions
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7
libtransmission/peer-io.cc
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@ -796,11 +796,8 @@ size_t tr_peerIo::getWriteBufferSpace(uint64_t now) const noexcept
void tr_peerIo::write(libtransmission::Buffer& buf, bool is_piece_data) void tr_peerIo::write(libtransmission::Buffer& buf, bool is_piece_data)
{ {
for (auto& ch : buf) auto [bytes, len] = buf.pullup();
{ encrypt(len, bytes);
encrypt(1, &ch);
}
outbuf_info.emplace_back(std::size(buf), is_piece_data); outbuf_info.emplace_back(std::size(buf), is_piece_data);
outbuf.add(buf); outbuf.add(buf);
} }

5
libtransmission/tr-buffer.h
View file

@ -266,6 +266,11 @@ public:
return iov; return iov;
} }
[[nodiscard]] std::pair<std::byte*, size_t> pullup()
{
return { reinterpret_cast<std::byte*>(evbuffer_pullup(buf_.get(), -1)), size() };
}
void commit(Iovec iov) void commit(Iovec iov)
{ {
evbuffer_commit_space(buf_.get(), &iov, 1); evbuffer_commit_space(buf_.get(), &iov, 1);