redis lua performance

article: http://www.jb51.net/article/98620.htm 2. Each big red envelope corresponds to two redis queues, one is the unpaid red envelope queue, the other is the red envelope. At the beginning, put all the little red envelopes that were not robbed into a queue of unpaid red envelopes. The unused red envelopes are JSON strings, such as {userId: ' 789 ', Money: ' 300 '}. 3. Use a map in the Redis to filter

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/1622342X4-0.jpg "title =" tornado.jpg "alt =" 101638437.jpg"/> Recently implemented an http interface ~ Http. The access result is json. Nginx performs load, web separation, and url forwarding ~ Tornado performs data operations and asynchronously calls lua interfaces ~ Memcached shares sessions (for the sake of not using redis for s

Lua scriptLocal Redis = require "Resty.redis" local red = Redis.new () red.connect (red, ' 127.0.0.1 ', ' 6379 ') local MyIP = Ngx.req.get_he Aders () ["$remote _addr"]if MyIP = Nil then MyIP = Ngx.req.get_headers () ["x_forwarded_for"]endif MyIP = Nil Then MyIP = ngx.var.remote_addrendlocal Hasip = red:sismember (' Black.ip ', MyIP) if hasip==1 then return ngx.exec ("@ErrorPage") Else return

This article describes how to use Nginx+lua+redis to build high-concurrency web applications, and Curl requests Nginx,nginx to query Redis through Lua, returning JSON Data.

(msg)Print ("----------------------------------------")Print ("LUA ERROR:"). ToString (msg): "\ n")Print (Debug.traceback ())Print ("----------------------------------------")EndWinsize = Ccdirector:shareddirector (): Getwinsize ()--Avoid memory leakCollectGarbage ("Setpause", 100)CollectGarbage ("Setstepmul", 5000)function do_obj_update (dt, obj)Local x, y = obj:getposition ()Local VX, VY = Obj:movedir ()x = x + vx*dt*obj:speed ()y = y + vy*dt*obj:s

In general, you don't need to know the details of the LUA implementation table, so you can use it. In fact, Lua spends a lot of time hiding the inner implementation details. However, implementation details reveal the performance overhead of table operations. Therefore, to optimize the program that uses the table (especially the

fasterStill, table indexing is a fairly efficient operation in Lua (e.g. strings was interned with precomputed hash), so this PO int can often be ignored unless profiling indicates optimization are needed.Performance: By implementing different, local variables are slightly faster than global variables. However, indexing by string in Lua table is also fairly fast. Because the string is instantiated in

1. Ngx_lua nodejs php comparisonAfter studying for a while, I found that the LUA syntax and JS really resemble each other, while the Ngx_lua model is also single-threaded asynchronous event-driven and works the same way as Nodejs, and the code is even better written than the Nodejs asynchronous callbacks. Ngx_lua Performance test, 100 concurrent php:17400nodejs:31197ngx_lua:32628Simply doing the HTTP proxy

significantly.The functions are as follows:function test（x1,x2，x3）endExperimental results: Can reflect the time of the stack is relatively fast, the application of the larger stack memory may occupy more time.Experiment Six: I extend the parameters of the function to 7, and we observe how the time changes.The functions are as follows:function test(x1,x2,x3,x4,x5,x6,x7)endExperimental results: Found to go time and experiment five similar, perhaps can verify the time of the stack is relatively fa

As in all other programming languages, in Lua, we should still follow the following two proverbs about program optimization: Principle 1: Do not optimize.Principle 2: Do not optimize for the time being (for experts). These two principles are particularly meaningful for LUA programming, where Lua stands out from the scripting language for its

follows: Local T = {} For i = 1970 T[i] = Os.time ({year = i, month = 6, day = 14}) End The following code is equivalent, but the table is reused: Copy Code code as follows: Local T = {} Local aux = {year = nil, month = 6, day = 14} For i = 1970 Aux.year = i T[i] = Os.time (aux) End A particularly effective way to implement reuse is to cache [2]. The basic idea is very simple, store the calculated results for the specified input, and the n

This article from http://blog.csdn.net/hellogv/, reference must indicate the source! This year, wearable devices suddenly fire ...... the difference between wearable devices and electronic products before the concept breaks out is that they are "Networked" and "supporting apps", so that a closed gadgets can be imagined by many people, diaosi's imagination is very rich .... Currently, wearable devices are divided into two types: "diaosi" and "Gao fushuai". The so-called "diaosi" configuration me