Software / code / prosody
Annotate
net/resolvers/manual.lua @ 10571:cfeb0077c9e9
net.server_epoll: Avoid concatenating buffer with single item
Saves creating a string that'll be identical to buffer[1] anyways, as
well as a C function call. Depending on Lua version and length of the
string, this could be reusing an interned string, but a longer one would
probably be duplicated for no reason.
Having exactly one item in the buffer seems like it would be fairly
common, but I have not done an extensive study. If opportunistic writes
are enabled then it will be even more likely.
This special case could be optimized like this in table.concat but it
does not look like it is.
| author | Kim Alvefur <zash@zash.se> |
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| date | Sat, 28 Dec 2019 06:18:58 +0100 |
| parent | 9691:e11e076f0eb8 |
| child | 12589:39ae08180c81 |
| rev | line source |
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1 local methods = {}; |
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2 local resolver_mt = { __index = methods }; |
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various: Don't rely on _G.unpack existing
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3 local unpack = table.unpack or unpack; -- luacheck: ignore 113 |
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net.connect: New API for outgoing connections, based on 'service resolvers'
Matthew Wild <mwild1@gmail.com>
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4 |
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net.connect: New API for outgoing connections, based on 'service resolvers'
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5 -- Find the next target to connect to, and |
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601681acea73
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parents:
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6 -- pass it to cb() |
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7 function methods:next(cb) |
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8 if #self.targets == 0 then |
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9 cb(nil); |
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10 return; |
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11 end |
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12 local next_target = table.remove(self.targets, 1); |
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13 cb(unpack(next_target, 1, 4)); |
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14 end |
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15 |
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16 local function new(targets, conn_type, extra) |
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17 return setmetatable({ |
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18 conn_type = conn_type; |
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19 extra = extra; |
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20 targets = targets or {}; |
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21 }, resolver_mt); |
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22 end |
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23 |
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24 return { |
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25 new = new; |
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26 }; |
