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@tsukanov-as tsukanov-as/test.lua
Last active May 12, 2019

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LuaJit 2.1 beta 3 vs Rust 1.34.1 https://habr.com/ru/post/450512/
local json = require('rapidjson')
local path = "C:/temp/1.json"
local file = io.open(path, 'r')
local debtors, debtorsMap, company, phones, phone, debt, debtor
debtors = {}
debtorsMap = {}
local s = file:read(256*1024)
local v, h
local b, e
function find_object(init)
local x = 0
local b = s:find("{", init, true)
if b then
local str, esc = false, false
for i = b, #s do
local c = s:byte(i)
if esc then
esc = false
elseif str then
if c == 0x5C then -- \
esc = true
elseif c == 0x22 then
str = false
end
elseif c == 0x22 then -- "
str = true
elseif c == 0x7B then -- {
x = x + 1
elseif c == 0x7D then -- }
x = x - 1
if x == 0 then
return b, i
end
end
end
end
return b, nil
end
while s do
if h then
s = h..s
end
b, e = find_object(1)
while e do
v = json.decode(s:sub(b, e))
company = v.company
if type(company) == 'table' then
company = company.name
end
assert(company)
phones = v.phones or {}
if type(phones) ~= 'table' then
phones = {phones}
end
phones[#phones+1] = v.phone
debt = v.debt or 0
for _, phone in ipairs(phones) do
debtor = debtorsMap[phone]
if debtor ~= nil then
break
end
end
if debtor == nil then
debtor = {
companies = {},
phones = {},
debt = 0
}
debtors[#debtors+1] = debtor
end
debtor.companies[company] = true
debtor.debt = debtor.debt + debt
for _, phone in ipairs(phones) do
debtor.phones[phone] = true
debtorsMap[phone] = debtor
end
b, e = find_object(e)
end
h = b and s:sub(b)
s = file:read(256*1024)
end
function out_list(src)
local t = {}
for k in pairs(src) do
t[#t+1] = k
end
return table.concat(t, ", ")
end
print("--------------------------")
for _, d in ipairs(debtors) do
print("debt: "..d.debt)
print("companies: "..out_list(d.companies))
print("phones:"..out_list(d.phones))
print("--------------------------")
end
print('done', os.clock(), 'sec.')
--[[
.\luajit.exe -v
LuaJIT 2.1.0-beta3 -- Copyright (C) 2005-2017 Mike Pall. http://luajit.org/
.\luajit.exe .\test.lua
--------------------------
debt: 910000000
companies: Шестерочка, Рога и копыта, Первая коллекторская
phones:788, 456, 789, 2128506, 123, 234
--------------------------
debt: 433200000
companies: Святой престол, Казачий спас
phones:234567, 666, 345678
--------------------------
done 1.353 sec.
--]]
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tsukanov-as commented May 11, 2019

Новая версия на Rust: https://github.com/epishman/habr_samples/blob/master/jsonparse/main.rs

.\rustjson.exe "C:\temp\1.json" -t 6 sync
634.3834ms

.\rustjson.exe "C:\temp\1.json" -t 6 async
501.4707ms

.\rustjson.exe "C:\temp\1.json" -t 1 async
1.9714653s

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tsukanov-as commented May 12, 2019

Новая версия на Rust: https://gist.github.com/red75prime/53111e066cb1a32721c461b24eadbe6e

.\rustjson.exe -f "C:\temp\1.json"
1.2950531s

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