JITWatch
dpp
JITWatch | dpp | |
---|---|---|
10 | 5 | |
3,015 | 227 | |
0.6% | - | |
6.3 | 7.0 | |
about 1 month ago | 6 months ago | |
Java | D | |
GNU General Public License v3.0 or later | Boost Software License 1.0 |
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
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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.
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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.
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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.
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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
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Compiler Explorer - Java support
We use https://github.com/AdoptOpenJDK/jitwatch for this.
- How to Read Assembly Language
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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.
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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.
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Is Java As Fast As C When It Comes To Stack
In what concerns HotSpot, one way would be JITWatch.
dpp
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Just a reminder that D is awesome.
do you know dpp ? https://github.com/atilaneves/dpp
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Fourth failure of trying to use D
give https://github.com/atilaneves/dpp a try ... I made it work and I'm not very literate in C
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D 2.096.0 Released and Other News
Which is capable of directly linking + invoking most C++ things (except constructors/destructors, it can't handle those, you need a function which calls the constructor from within C++) just given a type definition.
Then you have "d++", which lets you "#include" C/C++ headers. Under the hood tries to run an automatic syntax conversion. It can't handle but for simple code it works and can spit out the equivalent D.
https://github.com/atilaneves/dpp
Also you've got "dstep", which is "A tool for converting C and Objective-C headers to D modules"
https://github.com/jacob-carlborg/dstep
And finally you have the somewhat abandoned (but as far as I know mostly functional) Calypso, which is a fork of the LLVM-based D compiler that supports direct interop with C++. It's a pain to build though, haven't gotten around to trying to build it, but it does look wicked cool:
https://github.com/Syniurge/Calypso
pragma (cppmap, "cppheader.h"); // tells Clang to parse cppheader.h but do not import anything
- Dpp: Include C headers directly into D programs
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Why Zig When There Is Already C++ and Rust?
dpp* can't do function definitions yet but for declarations it's as easy as #including a C header file natively.
* https://github.com/atilaneves/dpp
What are some alternatives?
JMH - "Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness)
ldc - The LLVM-based D Compiler.
SharpLab - .NET language playground
automem - C++-style automatic memory management smart pointers for D
Sniffy - Sniffy - interactive profiler, testing and chaos engineering tool for Java
wg-allocators - Home of the Allocators working group: Paving a path for a standard set of allocator traits to be used in collections!
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.
LWDR - LightWeight D Runtime targeting ARM Cortex CPUs
LatencyUtils - Utilities for latency measurement and reporting
llvm-project - The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
quickperf - QuickPerf is a testing library for Java to quickly evaluate and improve some performance-related properties
reggae - Build system in D, Python, Ruby, Javascript or Lua