JITWatch
cling
JITWatch | cling | |
---|---|---|
10 | 19 | |
3,015 | 3,347 | |
0.6% | 1.1% | |
6.3 | 8.4 | |
about 1 month ago | 2 days ago | |
Java | C++ | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
JITWatch
-
It's 2023, so of course I'm learning Common Lisp
You can kind of do the same as DISASSEMBLE in Clojure.
There are some helper projects like https://github.com/Bronsa/tools.decompiler, and on the OpenJDK JitWatch (https://github.com/AdoptOpenJDK/jitwatch), other JVMs have similar tools as well.
It isn't as straightforward as in Lisp, but it is nonetheless doable.
-
How much is too much? 380+ lines of an AssertionUtil class Or Loggin classes in general.
As you have encapsulated the asserts inside methods, these will be called at runtime with the arguments evaluated (for example, creating that lambda). When assertions are disabled, the C1/C2 may inline the empty method call eventually, but I don't know whether it drops the lambda instantiation as well. You can use JITWatch to see what gets inlined. The general notion though is to not worry too much. Lazy log messages are a common pattern.
-
JIT x86 ia32
You can use jitwatch for this. To see the actual assembly code generated you will also need to use a debug build of the jvm.
-
SIMD accelerated sorting in Java – how it works and why it was 3x faster
If you use Oracle's own IDE, it will support it out of the box, as it already did on Sun's days.
Then there are other ways depending on which JVM implementation is used.
On OpenJDK's case you can load runtime plugin to do it
https://github.com/AdoptOpenJDK/jitwatch
- Equivalent of cppinsight for kotlin
-
Compiler Explorer - Java support
We use https://github.com/AdoptOpenJDK/jitwatch for this.
- How to Read Assembly Language
-
Why Zig When There Is Already C++ and Rust?
If you already know any JVM or .NET language, the first step would be to understand the full stack, you don't need C for that.
Many of us were doing systems programming with other languages before C went mainstream.
What you need to learn is computer architecture.
Getting back to JVM or .NET, you can get hold of JIT Watch, VS debug mode or play online in SharpLab.
Get to understand how some code gets translated into MSIL/JVM, and how those bytecodes end up being converted into machine code.
https://github.com/AdoptOpenJDK/jitwatch/wiki/Screenshots
https://sharplab.io/
Languages like F# and C# allow you to leave the high level comfort and also do most of the stuff you would be doing in C.
Or just pick D, which provides the same comfort and goes even further in low level capabilities.
Use them to write a toy compiler, userspace driver, talking to GPIO pins in a PI, manipulating B-Tree data stuctures directly from inodes, a TCP/IP userspace driver.
Not advocating not to learn Zig, do it still, the more languages one learns the better.
Only advocating what might be an easier transition path into learning about systems programming concepts.
-
JIT 101
You can enable a lot of debug information about how the compiler decides what to do with your code using feature flags like -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlining. If you want to dive deeper into the world of the Hotspot JIT Compiler, have a look at JITWatch.
-
Is Java As Fast As C When It Comes To Stack
In what concerns HotSpot, one way would be JITWatch.
cling
- Cling 1.0 Released
- Cling: Interactive C++ Interpreter
-
Interactive GCC (igcc) is a read-eval-print loop (REPL) for C/C++
More recent activity, but based on clang: https://github.com/jupyter-xeus/xeus-cling https://github.com/root-project/cling
-
It's 2023, so of course I'm learning Common Lisp
> The repl driven workflow is amazing and the lisp images are rock solid and highly performant.
do people not realize that basically everything vm/interpreted language has a repl these days?
https://www.digitalocean.com/community/tutorials/java-repl-j...
https://github.com/waf/CSharpRepl
https://pub.dev/packages/interactive
not to mention ruby, python, php, lua
hell even c++ has a janky repl https://github.com/root-project/cling
-
Compiled and Interpreted Languages: Two Ways of Saying Tomato
Interactive C++ with Cling, https://blog.llvm.org/posts/2020-11-30-interactive-cpp-with-cling/, https://github.com/root-project/cling/, Relaxing the One Definition Rule in Interpreted C++, https://dl.acm.org/doi/10.1145/3377555.3377901 (PDF: https://www.researchgate.net/publication/339463915_Relaxing_the_one_definition_rule_in_interpreted_C)
-
dont want online ones
Want to see your mind blown? Check out cling, a (sort of) C and C++ interpreter (it's a REPL). Or the work in progress, live-developed clauf, a real C interpreter.
-
How to cling for execute code plugin?
Cling: https://github.com/root-project/cling
-
Do you use Wokwi to test/simulate/debug your ESP32/Arduino code, or are there other dev tools a better fit for the ESP32?
Wanting to just test pure c or c++ functions that are hardware independent -> (solution that I'm using): cling just in time compiler, gives a shell that you can just experiment with C++ expressions
-
gcc is pre installed but g++ not?
C++ source cannot contain a shebang, but you can make them executable with binfmt-misc, and have the kernel pass them to a C++ interpreter such as Cling upon execution. Pretty much the same as running Python or Bash scripts.
- Fête à bord d’un avion de Sunwing | L’organisateur s’explique sur l’origine de sa fortune
What are some alternatives?
JMH - "Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness)
termux-ndk - android-ndk for termux
SharpLab - .NET language playground
xeus-cling - Jupyter kernel for the C++ programming language
Sniffy - Sniffy - interactive profiler, testing and chaos engineering tool for Java
femtolisp - a lightweight, robust, scheme-like lisp implementation
jHiccup - jHiccup is a non-intrusive instrumentation tool that logs and records platform "hiccups" - including the JVM stalls that often happen when Java applications are executed and/or any OS or hardware platform noise that may cause the running application to not be continuously runnable.
cppreference-doc - C++ standard library reference
LatencyUtils - Utilities for latency measurement and reporting
sectorlisp - Bootstrapping LISP in a Boot Sector
quickperf - QuickPerf is a testing library for Java to quickly evaluate and improve some performance-related properties
foth - Tutorial-style FORTH implementation written in golang