JITWatch
CIEL
JITWatch | CIEL | |
---|---|---|
10 | 13 | |
3,015 | 143 | |
0.6% | 0.7% | |
6.3 | 6.7 | |
about 1 month ago | 12 days ago | |
Java | Common Lisp | |
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.
CIEL
-
Writing Small CLI Programs in Common Lisp (2021)
and for CL: https://github.com/ciel-lang/CIEL/ (pre-alpha) CL with many batteries included (json, csv, http, CLI parser…) so the scripts start fast.
-
Sharpscript: Lisp for Scripting
As a CL addict, this isn't unlike Babashka: fast-starting CL scripting with batteries included. https://github.com/ciel-lang/CIEL (alpha) (otherwise the solution is to build a binary)
-
It's 2023, so of course I'm learning Common Lisp
> lots of interoperability libraries
That's true. For cases when you want to start with a good set of libraries (json, csv, databases, HTTP client, CLI args, language extensions…), I am putting up this collection together: https://github.com/ciel-lang/CIEL/ It can be used as a normal Quicklisp library, or as a core image (it then starts up instantly) or as a binary.
It can run scripts nearly instantly too (so it isn't unlike Babashka). We are ironing out the details, not at v1.0 yet.
> handling a runtime error by just fixing the broken code--in-place, without any restarts [from the blog]
Also (second shameless plug) I should have illustrated this here: https://www.youtube.com/watch?v=jBBS4FeY7XM
We run a long and intensive computation and, bad luck, we get an error in the last step. Instead of re-running everything again from zero, we get the interactive debugger, we go to the erroneous line, we compile the fixed function, we come back to the debugger, we choose a point on the stackframe to resume execution from (the last step), and we see our program pass. Hope this illustrates the feature well!
- The Embeddable Common Lisp [pdf]
-
Improving REPL experience in terminal?
check out CIEL, one of it's goal is to be a quality terminal repl
-
networking and threads
I've been doing the protohackers challenges in common lisp to learn, and I ran into a problem that is possibly a bug in the socket library, or much more likely in my misunderstanding it. At any rate the best workaround a found seems pretty ugly, so can anyone advice what would be the cleanest way to solve it, and how we're supposed to deal with sockets? The problem is basically make a tcp server, that forwards all connections to an upstream server, and does a regex find and replace on all the traffic that passes through. Here's my working solution. I haven't learned much how asdf and packages work yet, I am just using CIEL which is SBCL (2.2.9.debian) with a bunch of libraries already loaded, I think if you load usocket, usocket-server, cl-ppcre, and bordeaux-threads it should run. The program is simple, I just forward all traffic from the client to the upstream doing regex replacement on each line, and spawn a thread that handles forwarding all traffic from the upstream to the client with the regex replacement. The issue is that when the client disconnects, my program doesn't disconnect from the upstream, even when I call (close upstream) and (socket-close socket). Before closing the socket or stream, the connection shows as established in ss -tp and as belonging to the sbcl process. After calling close on the socket and stream, the connection still shows as established, just it no longer shows as belonging to the sbcl process, and tcpdump shows that the 4-way termination handshake is not sent. After killing the background thread that is also reading the same socket, the 4-way termination is sent, and the connection is closed. It seems like calling close on the stream or socket should close it? Are sockets or streams not safe to share between threads? Is there a cleaner way to handle closing the upstream connection when the client disconnects rather than calling destroy thread?
-
Common Lisp Implementations in 2023
I quite agree, so I'm making a meta-library to have useful libraries available out of the box: https://github.com/ciel-lang/CIEL/ It's CL, batteries included. You can use it as a library, as a core CL image (loads up faster), and as a binary to have a REPL, and to run scripts:
ciel --script myscript.lisp
- CIEL Is an Extended Lisp. Batteries Included
-
Babashka: GraalVM Helped Create a Scripting Environment for Clojure
No, we have to build a binary, which starts up super quickly.
I began to put together a "distribution" of useful CL libraries for everyday tasks: https://github.com/ciel-lang/CIEL/ It comes as:
- a lisp core, which you can use in your editor setup instead of sbcl or ccl, the advantage is that it loads instantly with all these libraries built-in (instead of quickloading all of them when needed)
-
Any projects want/need help?
Hi there. I'd enjoy help on anything web development for openbookstore: https://github.com/OpenBookStore/openbookstore (especially now: setting up i18n) Or, we could work on the terminal REPL experience for the CIEL meta-package: https://github.com/ciel-lang/CIEL/ We could use a better base like cl-repl or better yet, Lish.
What are some alternatives?
JMH - "Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness)
quicklisp-client - Quicklisp client.
SharpLab - .NET language playground
ichiran - Linguistic tools for texts in Japanese language
Sniffy - Sniffy - interactive profiler, testing and chaos engineering tool for Java
racket-gui-easy - Declarative GUIs in Racket.
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.
arrows - Implements -> and ->> from Clojure, as well as several expansions on the idea.
LatencyUtils - Utilities for latency measurement and reporting
cl-utils - GrammaTech Common Lisp Utilities
quickperf - QuickPerf is a testing library for Java to quickly evaluate and improve some performance-related properties
common-lisp-standard-library