@rovarma

Co-Founder @SuperluminalSft, building the Superluminal CPU profiler

 The Netherlands
superluminal.eu
Joined February 2012
  • Tweets2.5K
  • Following462
  • Followers1.5K
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New article! A user is reporting full system freezes while using Superluminal on Linux. What do you do? Cry? Well, we did a little bit. But we also dove into the kernel...again, fixing several issues in eBPF's spinlock implementation. Read all about it: rovarma.com/articles/a-tale-…

A tale about fixing eBPF spinlock issues in the Linux kernel | Ritesh Oedayrajsingh Varma

A system freeze led us deep into Linux spinlock internals, where we helped find not one but three bugs in the kernel's resilient locking code used by eBPF.

rovarma.com
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Nice article! Had strong deja vu while reading this to the UIPainter created at Guerrilla in 2014 or so that I did some work on back then, though at the time that didn’t have the caching layer described here. So was funny to see this at the end. Time is a flat circle :-)
Blick Video Editor
@Blick_Editor23h
A look under the hood of Blick. @falk_moritz shares how our UI renderer works and some of the decisions that shaped it. blickeditor.com/blog/caching…

Don't throw it all away. Caching an immediate-mode UI | Blick Blog

How Blick’s UI Painter keeps the pixels it has already rendered, combines shapes and opacity groups, and saves work behind an immediate-mode UI.

blickeditor.com
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Ritesh Oedayrajsingh Varma retweeted
Stefan Reinalter@molecularmusingOct 15
Went ahead, downloaded a 200MB installer, launched the thing. Didn't feel like 50ms at all. Pulled out Superluminal of course, because Superluminal never lies. Turns out it's ~500ms, not 50ms. From RtlUserThreadStart to the first ZwUserShowWindow: 476ms.
Matt Ao@MattyAyOhOct 15
Replying to @molecularmusing
we do care, and our window is up in 50ms. bottlenecks exist elsewhere, they will be taken care of soon
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Superluminal@SuperluminalSftOct 13
Tired of elevation prompts whenever you start a capture? So were we! Our latest Insider update adds a system-installed capture service. With it, you no longer need elevation to start captures. This also enables AI agents to autonomously create captures without user intervention!
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Practically speaking, we’ve gotten zero x11-related bug reports in the Superluminal Linux beta (“it just works”), and multiple Wayland-related bugs. And that’s while using Qt which supposedly supports both. I still don’t know how to fix the Wayland bugs. Depending on your target audience, I don’t think you can get away with only supporting one of them though. Wayland apps won’t run on x11. x11 can run on wayland via xwayland, but like any “emulation” layer, that has its own issues, particularly around things like DPI. So like many things in Linux user space, from an app developer’s perspective: it’s a mess.
Sherief, FYI
@SheriefFYIOct 12
can someone give me a human opinion, with an attempt at impartiality, about Wayland versus X11 for end users? I'm moving a Win32 app to Linux and there are choices to be made
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There’s a profiler in town that *doesn’t* need $3400 of RAM to open a perf capture for those who are wondering. It even works on the same source (.etl) files as WPA, so you could literally do an A/B comparison! superluminal.eu/

Superluminal. Stop Fighting Your CPU Profiler & Start Fixing

Superluminal is the fastest, most reliable way to visually analyse your performance captures. Discover how we can support your workflows.

superluminal.eu
Rick Brewster@rickbrewPDNOct 7
Replying to @rickbrewPDN @ZoidCTF
and yes I could actually justify it -- if I want to run my app loading large files, *and* while taking an ETL trace for performance analysis with WPA, while having one other WPA instance open with an earlier trace for comparison purposes ... that's easily 100 GB
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Did I mention I love seeing & reading about performance optimizations, particularly if they involve Superluminal? 💖
gingerBill@TheGingerBillOct 4
For the past week, my life has been staring at profilers (Spall output and @SuperluminalSft) all to improve the performance of the Odin compiler. It's looking a heck of a lot healthier than before, but damn is it still not done yet. n.b. red at the end is the external linker
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Agree with this. I also think “undervisualized” areas of programming can be interesting business niches for those so inclined. The basic premise of Superluminal was essentially just “hey what if we *visualized* performance data instead of throwing tables of numbers in your face?”. And that clearly resonated a lot.
Nic Barker
@nicbarkeragainSep 29
The more I dig into the fundamentals of programming education, the more I realise we've had a truly profound failure to visualise both the structure of programs themselves as well as the data of running programs. Likely we've selected for people who can mentally visualise.
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those who do understand:
Mario Zechner
@badlogicgamesSep 25
i remember a time were we argued about pre and post increments. you kids wouldn't understand.
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Arseny Kapoulkine@zeuxcgSep 25
meshoptimizer 1.3 is out! Featuring a new voxel remesher, support for normal generation, several simplification improvements and various optimizations. GitHub stars and retweets appreciated! Project started 10 years ago; excited for the years to come! github.com/zeux/meshoptimize…
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Seeing actual performance optimizations made with Superluminal will never get old to me :-) Check it out!
Godot Engine@godotengineSep 15
From the outside, rendering optimization can look a little bit like black magic. Clay John, lead maintainer of the rendering team, is here to show some optimizations from this year to highlight that optimizing rendering code isn’t as scary as it sounds. godotengine.org/article/rend…

Optimizing CPU-side Rendering Code – Godot Engine

Optimizing CPU code is a lot of fun. Here’s how we do it

godotengine.org
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Ritesh Oedayrajsingh Varma retweeted
Wassim Alhajomar@WassimulatorAug 1
Blick is RELEASED! go get it! blickeditor.com/

Blick | The first video editor you'll truly love

A fully native NLE built from scratch, for the art of editing. Scrub, cut and keyframe at the speed of thought. Available now for Windows and macOS.

blickeditor.com
Blick Video Editor
@Blick_EditorAug 1
Blick is out NOW!
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Multiple replies on this saying “just use an EV cert for signing”, which a) they already did, as you can see from the publisher and b) EV certs no longer grant instant “SmartScreen” reputation since somewhere this year. Such a stupid system. learn.microsoft.com/en-us/wi…

SmartScreen reputation for Windows app developers - Windows apps

Understand how Windows Defender SmartScreen reputation works, what to expect when you publish a new app, and how to minimize warnings for your users.

learn.microsoft.com
Sherief, FYI
@SheriefFYIAug 1
an absolutely retarded security posture, what's the point of Authenticode then?
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Ritesh Oedayrajsingh Varma retweeted
Бранимир Караџић@bkaradzicJul 28
Parsers don’t have to be complicated bkaradzic.github.io/posts/sc…

Parsers don’t have to be complicated

Introduction Years ago I started writing a proper shader front-end parser for bgfx and used the Lemon parser generator. It was small, it worked, but I never liked the code it produced. The generated...

bkaradzic.github.io
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If you want a CPU profiler with actually *good* UI/UX on Linux instead of…that, may I interest you in Superluminal superluminal.eu/applications…

Superluminal For Linux | Fast Profiling Without The Challenges

No pages of installation guides. No Gigabytes to download and install. Just unzip, run and focus on performance issues. It Just Works™.

superluminal.eu
ThePrimeagen
@ThePrimeagenJul 14
Guys... I take back everything I have ever said. I am a terrible programmer. My game is spending 63% of its time in mouse entries map setting / getting...
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The mythical Year of the Linux Desktop gets another year closer
x64dbg@x64dbgApr 23
Replying to @x64dbg
There is also a pre-alpha Linux version brewing 👀
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Ironically, the move is driven more by Windows getting steadily worse, rather than Linux getting steadily better. If our main business wasn't on Windows, I'd be seriously considering switching to Linux fulltime myself now that we have Superluminal running on it.
Casey Muratori@cmuratoriJul 2
Year of the Linux Desktop continues unabated!
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"Shipping a binary on Linux is easy, just use [appimage|flatpak|snap]!" appimage|flatpak|snap:
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