prosody
735b8f4a6d7e
spec/util_random_spec.lua

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spec/util_random_spec.lua @ 11661:735b8f4a6d7e

net.http: Send entire HTTP request header as one write When opportunistic writes are enabled this reduces the number of syscalls and TCP packets sent on the wire. Experiments with TCP Fast Open made this even more obvious. That table trick probably wasn't as efficient. Lua generates bytecode for a table with zero array slots and space for two entries in the hash part, plus code to set [2] and [4]. I didn't verify but I suspect it would have had to resize the table when setting [1] and [3], although probably only once. Concatenating the strings directly in Lua is easier to read and involves no extra table or function call.
author Kim Alvefur <zash@zash.se>
date Thu, 08 Jul 2021 18:21:59 +0200
parent 8450:3a9a3d90c44c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 local random = require "util.random";
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3
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4 describe("util.random", function()
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5 describe("#bytes()", function()
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6 it("should return a string", function()
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7 assert.is_string(random.bytes(16));
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8 end);
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9
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10 it("should return the requested number of bytes", function()
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11 -- Makes no attempt at testing how random the bytes are,
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12 -- just that it returns the number of bytes requested
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13
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14 for i = 1, 20 do
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15 assert.are.equal(2^i, #random.bytes(2^i));
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16 end
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17 end);
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18 end);
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19 end);