Note that the clbg currently only shows lua, not luajit. Most of the other benchmarks shown are lua ports of standard. Fortunately postgresql has lua as one of its procedural languages but i dont know if this pl lua is luajit or only lua and therefore the performance associated to them. Lua for the most part lends itself well for interpreter and jit performance, but this isnt the deciding factor that its made to be. As a result, its not indicative of what its performance may be on more realistic data. This test profile is a collection of lua scriptsbenchmarks run against a locallybuilt copy of luajit upstream.
All the binaries were built using tecmake with the following configuration parameters and changes lua 5. When built on linux, the lua interpreter built with the standard libraries takes 182k and the lua library takes 243k. The quite interesting luajit project a jit compiler for lua has the policy of not distributing binaries. Id suggest rewriting the benchmark so that on each loop iteration a unique value is computed and then is used e. That means code reuse isnt as widespread in lua as it is in other languageseach application embedded lua is sort of its own little world, and its not always easy to share code between them. Luajit is meant to be a dropin replacement for stock lua, so it should work just by replacing it. The presented benchmark results are only indicative of the overall performance of each vm. Even without the jit, luajit is already faster than baseline lua for three reasons. Luajit is my preferred lua scripting engine because of its raw speed. Precompiled lua libraries and executables are available at luabinaries.
Different lua implementations had different benchmark suites, mostly on the small side, and not easily compared. I have read that luajit have performance similar to c but without the dangers of using c. Benchmark results shown in previous versions of luajit or the clbg are not directly comparable. Internal selftest on startup to detect miscompiles. Whats a fast way to insert a large number of elements into a lua table. Perhaps you shouldnt even reply to comments seeing. I submitted a very, very minor patch to make it run on openbsd in 2012 so that i could try out this vm that id heard others rave about. By instrumenting the runtime, we measure the javascript behavior of web applicationsour results show that real web applications behave very differently from the benchmarks. Lua is a powerful, dynamic and lightweight programming language. Feb 16, 2010 neopallium bindings latest these new lua bindings add optional support for luajit2s new ffi extension. Its just not as visible because its used as an embedded scripting language. I generally only use the 32bit version of luajit due to its greater memory capacity. My lovehate relationship with luajit 2015 hacker news. The bindings will still work with lua vms that dont have the ffi extension by falling back to using the standard lua c api.
Luajit is a tracing justintime compiler jit for lua, and its one of the fastest compilers for a dynamic language around. Finally lua plays so nice with c that if you need to optimise for speed you can rewrite it in c a lot easier than other languages. Does postgresql pllua language have luajit performance. Substantial fractions of large applications have been written in lua. Well, its stopped saying that it just found a malformed number literal with an unexpected letter. Luajit binaries frontend, static library, dynamic library. So, to optimiz e programs that use tables that is, practically any lua program, it is good to k now a little about how lua implements tables. The reason for this is that many benchmarks run too quickly for reliable measurements to be taken. Personally ive been aware of luajit for many years. Most of the other benchmarks shown are lua ports of standard benchmarks. Nov 17, 2019 im not sure what the js semantics here are, in lua getfenv prevents us from realizing that math. If youve already embedded lua into your application, you probably dont need to do anything to switch to luajit, except link with a different library. The external lua client1 supports luajit and puc lua and the ci2 runs puc lua on every pr and commit.
Lua is fast not only in finetuned benchmark programs, but in real life too. This test profile is a collection of lua scripts benchmarks run against a locallybuilt copy of luajit upstream. The scale factor is exponential, so run it with a small number between 2 and 10 and time it e. Comes bundled with the luajit command, which is a simple shell script that finds and loads the appropriate luajit executable for your platformarch so that typing. The lua users wiki lists many usercontributed addons for lua. I was just sitting and goofing around and then it hit me benchmarks. If you need even more speed, try luajit, an independent implementation of lua using a justintime compiler. Theres a lot of discussion and advice floating around regarding such a primitive topic, so its time to dig into some implementation details. You should be able to use a json library in a lua program to be debugged. Speed easier bindings done from the lua side, given a simple c abi of whatever needs binding. Its as fast as you can get with the standard lua c api. Fortunately postgresql has lua as one of its procedural languages but i dont know if this pllua is luajit or only lua and therefore the performance associated to them. Many of these benchmarks have changed over time both spec and code and the selection of benchmarks has varied a lot, too.
As there seem little to no luajit binaries anywhere on the web, i decided to put some up myself. Luajit is significantly faster than lua, so it is even more significantly faster than this port to the web. We dont want to compile stuff ourselves on windows. Most jit compilers dont have comparable performance. Luajit has an ffi which allows code to be jit compiled, whereas regular c api calls arent 1. You can use the lua debugger extension to debug lua programs with visual studio code. The results old version these are the results for the old version, missing the local variable test and measuring elapsed time in seconds. This is very useful if you have an existing c library you need to integrate with lua or quickly get a lua script running on the c side of the game. Luajit is still faster than vanilla lua, but only like 3x, not 5100x. Luajit is not faster than the sun jvm, although it is comparable. Jan 31, 2018 lua for windows is a combination of lua clean libraries, that features a luacapable editor which enables you to create powerful scripts lua is a scripting language that merges procedural syntax.
Bsd, mac os x, windows and probably anything else you can find. Click to the left for the 1st one and to the right for the 2nd one. But due to an architectural decision made by apple, you cannot jit compile code for ios. However, its important to remember that even without luajit, lua is relatively fast compared to most other dynamic languages, like python and ruby, that are. You should be able to use luasocket in a lua program to be debugged. Download lua source code and extract to root of working tree. This page explains how to build lua bitop from source, against an existing lua installation. It was originally made to demonstrate how jit compilers can do all sorts of crazy stuff to your code especially luajit and was meant to be a starting point of discussion about what exactly luajit does and how. Contribute to luajitluajit development by creating an account on github.
There are detailed instructions in the package but here is a simple terminal session that downloads the current release of lua and builds it in linux. Lua is implemented in pure ansi c and compiles unmodified in all platforms that have an ansi c compiler. Luajit extends lua with a powerful ffi interface that allows calling c functions directly, without the need to write glue code. Luajit is an extremely optimized just in time compiler for lua. The second thing that happened was that we realised that the current state of lua benchmarking was not good enough for anyone to reliably tell if theyd improved luajit performance or not.
That speed is even more important when running on mobile, where cpus arent as fast. The implementation of tables in lua involves some clever alg orithms. Lua can be built on any platform with a ansi c compiler. Scimark for lua has been split up into individual benchmarks which are run with a fixed iteration count to get a runtime and not an autoscaled score. Also luajits interpreter is completely different from puc luas. Thirdparty scripting can easily crash the application bindings seem to be simpler. Download lua sha1 source the benchmark script i use just reads from stdin and prints out the sha1 hash. The following xml output specifies that windows does not notify the user when programs try to install software or make changes to the computer. One of the best features of lua is its very well designed c api. I used luajits clever assembly system in a small toy project. The luajit ffi docs mention that calling from c back into lua code is relatively slow and recommend avoiding it where possible do not use callbacks for performancesensitive work. I am willing to benchmark my lua code in order to generate some statistics. Build luajit and link static library to universal windows project vs2015 karel tuma.
Since i dont just want to measure it once, how long does it take my function to execute i was looking for some benchmarking libs, but didnt find any. This seems great for people who want to maintain their own branches and keep track of how they compare with everybody elses. The neovim patch3 to add builtin lua scripting will support both luajit and puc lua. For a list of the supported windows editions and architectures that this component supports, see microsoft windows luasettings.