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suckless conference 2016, Frankfurt/Main, Taunus, Germany | software that sucks less

suckless conference 2016, Frankfurt/Main, Taunus, Germany

slcon3 will be held near Frankfurt/Main on 2016-09-(23-25).

The CfP is closed now. See the schedule below for details.


Please note that we will collect a conference fee for the conference room and lunch/drink package. If the preliminary schedule sticks to Saturday being the only day when we book the conference room, we need to expect around 45 EUR conference fee per person.


Friday, 2016-09-23

Arrival day.

(19:30) Welcome in the Biergarten “XXL Waldgeist”, Anselm R Garbe

We will gather together and check out the XXL Waldgeist.

Waldgeist Hofheim
Schlossstr. 70
65719 Hofheim

Saturday, 2016-09-24

(10:00-10:05) Welcome, Anselm R Garbe

Anselm will open slcon3 talk session

(10:10-10:40) libzahl – simple bignum arithmetic, Mattias Andre

Software dependent on algorithms inherently perform
better the more complex algorithms. Can we despite
this compete with GNU MP and still have a simple
solution? This is a discussion about libzahl's design
and future.

(10:45-11:15) XML damage control, Silvan Jegen

XML is a horrendously abused file format that suffers severely from
over-engineering. There arguably is one legitimate use case for (a subset
        of) XML however: text markup. In this presentation I will show why that
is and how to best deal with XML when encountered in such circumstances.

To ease the pain for people like me who have to work with XML every day,
I will first give an overview of different parsing strategies employed in
XML libraries and introduce the most bearable APIs of the ones available.

The second part of the presentation is dedicated to the benchmarking of the
most sensible XML libraries and to the discussion of possible alternative
parsing approaches as well as their implementation.

(11:20-11:40) Stali Pi B+, Manu Raster

Report on readying Stali for the Raspberry Pi B+ (32 bit). It is
also a story about monsters and maiden when we take into comparison
other piles of code (kernels, distros etc.) and their build
systems. Portability conceptions encountered en route are
reviewed and ranked from 1 to 3 (depraved, naive and not too bad).

(11:40-12:00) sRGB and colorspace lightening talk, Laslo Hunhold

(12:00-13:00) Lunch break

(13:15-14:10) SCC and QBE for practical compilation, Roberto E. Vargas Caballero

For now decades, we have witnessed a dramatic increase in the complexity
of compilers. Mainstream compilers have become huge C++ programs that try
to incorporate all the state-of-the-art research. SCC and QBE propose a
new approach to compilation where simplicity and predictability prime over
reckless efficiency. These new design constraints have security benefits
(as advocated by the "boring crypto" movement) and allow bootstrapping
new systems more easily.

(14:15-15:15) The Myrddin Programming Language, Ori Bernstein

Myrddin is a programming language that was written for a saner, easier to
use programming environment that I find more pleasant than C. The language
lives somewhere between C and ML in design, with parametric polymorphism,
type inference, closures, and pattern matching. In some ways, it can be
thought of as a suckless rust.

It also comes with a complete replacement for many standard libraries on a
number of popular (and less popular) platforms.

(15:20-15:35) ii-like chatting improvements, Jan Klemkow

Since slcon2 I have made several improvements in my ii-like chat
infrastructure.  In this talk I will give an overview of my various
activities in this area.  I will present new features in my UCSPI tool
chain, a new modular front end 'lchat' and the idea of runit integration.

(15:40-16:10) text engine, Francesc Hervada-Sala

The right approach to software systems was introduced by the Unix programming
environment over forty years ago with a file system that opened access to data
across all applications and with a universal interface model based on strings.
This approach must be deepened. Let us define "text" as the semantic data
structure that results from parsing strings. Imagine that a software system has
a "text engine" at its kernel. When you edit a run control file and save it,
the text engine parses it and stores its parse tree into the central
repository. When you execute an instruction at the shell, the text engine
parses the command line and sets all parameters in the repository before
executing the command. An application retrieves a configuration parameter by
querying the text engine. In such a system parsers for particular formats or
languages would not be embedded into particular applications or commands,
they would be stand-alone software units with the sole purpose of converting
a string into a semantic representation in the text engine's repository.
Applications would not have to deal with and not be tied to particular file
formats and languages, and the user would be able to choose the format or
language to use for any configuration statement. The user would change the
name of a file and would not need to adjust all references to it inside
scripts and other files, because the reference in the repository (say as
inode) would remain unchanged. To experiment with this new
approach I am beginning to develop a text engine

(16:10-16:20) Coffee break

(16:20-16:55) Suckless Image Processing, Enric Meinhardt-Llopis

An image is an array of numbers.  Since arrays of numbers are
natively represented in C, this language is well-suited for image
processing algorithms.  Moreover, many complex image processing
algorithms are pipelines of simple, independent steps.  Thus,
the UNIX programming environment is an ideal platform for image
processing, where several simple programs written in C share
information through UNIX pipes.  In this talk, we will see many
examples of simple image processing utilities (blur, local maxima
detection, interpolation, warping, pointwise algebraic expressions,
morphological filters, block matching, optical flow, image fusion)
and how they are naturally combined to perform advanced imaging
techniques;  in the selected example, we show a reflection removal
method based on the combination of several images.  An important
issue, with far-reaching philosophical consequences, is the data
format written through the pipes.  We explain why the farbfeld image
format---proposed by the suckless community---is inappropriate in
general, because of the need to represent negative and floating-point
pixel values.

(17:00-17:20) shared farbfeld, Jan Klemkow

Farbfeld is a good base for general purpose image processing.  The
tools that have been made so far demonstrate that sophisticated image
processing can be achieved using cooperative programs.  In this talk I
will present a shared memory interface that speeds up the usage of
farbfeld tools.  Furthermore, I will sketch the architecture of a
suckless-style Photoshop-like graphical image editor, and present a PoC
implementation together with some benchmarks.

(17:20-17:30) Display servers, Mattias Andre

(17:35-18:00) stali learnings and beehive observation, Anselm R Garbe

Anselm will present his learnings with stali since last slcon2. In
particular he will discuss his new goals with stali and reasoning behind why
making stali self-bootstrappable is a bad idea.  He will also
demonstrate stali as platform for observing his beehives.

Official slcon3 talk session end.

(18:10-19:00) e.V. Mitgliederversammlung (yearly e.V. member meeting)

- Report of the chairs, Anselm R Garbe, Laslo Hunhold
- Report of the treasurer, Jan Klemkow
- Other topics (members can raise topics until the begin of the Mitgliederversammlung)

(19:30-*) social event

Sunday, 2016-09-25

No talk session plans, hack sessions and departure day.


You can arrange your booking at the venue if you like:

Hotel am Rosenberg
Wielandstrae 24
65719 Hofheim am Taunus
+49 (0) 6192 292-0

When booking a room, use the booking code: slcon or refer to the e.V. event.

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