2020-08-11
2020-08-11. Open Source › mORMot Framework
For several reasons, only plain ASCII characters are accepted in Web URIs. Other characters should be escaped with % and the hexadecimal value of its code.
The tilde character ~ is not needed to be escaped... at least in theory... because in practice most code expects it...
A journey into confusing RFCs...
2020-07-20
2020-07-20. Open Source › mORMot Framework
A regression in the Delphi 10.4 compiler was identified. Its optimizer wrongly deletes some code, in one very specific part of the framework.
As a result a GPF (Access violation) may be triggered with Delphi 10.4 in release mode - the debug mode (when optimization is disabled) has no problem. Thanks to great user feedback, we were able to circumvent it. But we should better stay in alert, like any mORMot, until Delphi 10.4 officially release a patch.
2020-06-05
2020-06-05. Open Source › mORMot Framework
About latest SQlite3 3.32.xxx there is a big problem with codecs.
Critical changes to the public SQLite code were introduced on Feb 7, 2020: “Simplify the code by removing the unsupported and undocumented SQLITE_HAS_CODEC compile-time option”. With the release of SQLite version 3.32.0 on May 22, 2020 these changes finally took officially effect, although they weren't officially announced.
As a sad and unexpected consequence, we are NOT ANY MORE able to compile the new SQlite3 amalgamation with our encryption patch.
2020-05-07
2020-05-07. Open Source › mORMot Framework
As a gift to the FPC community, I just committed a new Memory Manager for FPC.
Check mormot.core.fpcx64mm.pas in our mORMot2 repository.
This is a stand-alone unit for FPC only.
It targets Windows and Linux multi-threaded Service applications - typically mORMot daemons.
It is written in almost pure x86_64 assembly, and some unique tricks in the Delphi/FPC Memory Manager world.
It is based on FastMM4 (not FastMM5), and we didn't follow the path of the FastMM4-AVX version - instead of AVX, we use plain good (non-temporal) SSE2 opcode, and we rely on the mremap API on Linux for very efficient reallocation. Using mremap is perhaps the biggest benefit of this memory manager - it leverages a killer feature of the Linux kernel for sure. By the way, we directly call the Kernel without the need of the libc.
We tuned our x86_64 assembly a lot, and made it cross-platform (Windows and POSIX). We profiled the multi-threading, especially by adding some additional small blocks for GetMem (which is a less expensive notion of "arenas" as used in FastMM5 and most C allocators), introducing an innovatice and very efficient round-robin of tiny blocks (<128 bytes), and proper spinning for FreeMem and medium blocks.
It runs all our regression tests with huge performance and stability - including multi-threaded tests with almost no slow down: sleep is reported as less than 1 ms during a 1 minute test. It has also been validated on some demanding multi-threaded tasks.
2020-03-28
2020-03-28. Open Source › mORMot Framework
On server side, a lot of CPU is done processing conversions to or from text. Mainly JSON these days.
In mORMot, we take care a lot about performance, so we have
rewritten most conversion functions to have something faster than the Delphi or
FPC RTL can offer.
Only float to text conversion was not available. And RTL str/floattexttext
performance, at least under Delphi, is not consistent among platforms.
So we just added a new Double-To-Text set of functions.
2020-03-06
2020-03-06. Open Source › mORMot Framework
First of all, if it was not clear enough: Delphi will continue to be supported in mORMot 2.0. Some people reported that our previous article may have been misleading. But perhaps not all versions. For sure, Delphi 5 and Kylix will not be supported in mORMot 2. It is also possible that it would not […]
2020-03-03
2020-03-03. Open Source › mORMot Framework
The more I think of it, the more I am convinced it is time to change how the
framework is versioned.
We have version 1.18 since years... difficult to follow... time to upgrade!
I would like to upgrade mORMot to version 2 - with a major
refactoring.
2020-02-17
2020-02-17. Open Source › mORMot Framework
Our Open Source framework includes some optimized asm alternatives
to RTL's move() and fillchar(), named
MoveFast() and FillCharFast().
We just rewrote from scratch the x86_64 version of those,
which was previously taken from third-party snippets.
The brand new code is meant to be more efficient and maintainable. In
particular, we switched to SIMD 128-bit SSE2 or 256bit AVX memory access (if
available), whereas current version was using 64-bit regular registers. The
small blocks (i.e. < 32 bytes) process occurs very often, e.g. when
processing strings, so has been tuned a lot. Non temporal instructions (i.e.
bypassing the CPU cache) are used for biggest chunks of data. We tested
ERMS support, but it
was found of no benefit in respect to our optimized SIMD, and was actually
slower than our non-temporal variants. So ERMS code is currently disabled in
the source, and may be enabled on demand by a conditional.
FPC move() was not bad. Delphi's Win64 was far
from optimized - even ERMS was poorly introduced in latest RTL, since it should
be triggered only for blocks > 2KB. Sadly, Delphi doesn't support AVX
assembly yet, so those opcodes would be available only on FPC.
Resulting numbers are talking by themselves. Working on Win64 and Linux, of course.
2019-10-30
2019-10-30. Open Source › mORMot Framework
I just finished my workshop at EKON 23.
Like every year, it was a great event to attempt to, and I enjoyed presenting 2
sessions and 1 workshop.
Sessions were about "Kingdom Driven Design" (KDD), which is the
name I used to define a cut-down version of "Domain Driven Design" (DDD).
Less paranoid, a bit less isolation, but perhaps more common sense for the less
sensitive projects.
Some presentations and code are now available!
2019-10-17
2019-10-17. Open Source › mORMot Framework
I just found some very nice articles by Stephan Bester about first steps to mORMot's ORM and SOA.
Don't be scared by the mORMot: it is more stressed than you
are.
This painful picture just
won a wildlife photographer prize... poor little rodent!
2019-09-21
2019-09-21. Open Source › mORMot Framework
A long-awaited feature was the ability to create stand-alone mORMot Win64 applications via Delphi, with no external sqlite3-64.dll required.
It is now available, with proper integration, and encryption is working!
2019-09-18
2019-09-18. Open Source › mORMot Framework
There are still some days to join EKON 23 conferences with the reduced price!
I will make 2 sessions, and 1 workshop, in English (my German is not good
enough), about practical project design and mORMot.
If you find DDD is a bit too much for you, but still want to write clean code,
check this!
2018-11-24
2018-11-24. Open Source › mORMot Framework
Now that Delphi 10.3 Rio is out, we had to ensure that our little mORMot would run with this revision. Since we don't make any commercial software with Delphi any more (we switched to FPC), I downloaded the Community Edition. We disabled the Error Insight feature, which seems not very stable […]
2018-11-12
2018-11-12. Open Source › mORMot Framework
Sometimes, I am asked what could be done with mORMot. Well, we've been using the library at LiveMon to analyse logs for example. And we're able to get speed of a few TB/sec. Speed above is no typo: TB/s not GB/s. For a regex search, not a per-word dictionary based lookup. With a cross-platform […]
2018-03-12
2018-03-12. Open Source › mORMot Framework
We just committed a deep refactoring of the SynSQlite3Static.pas unit - and all units using static linking for FPC. It also includes a new encryption format for SQlite3, using AES, so much more secure than the previous one. This is a breaking change, so worth a blog article! Now all static .o .a […]
2018-02-07
2018-02-07. Open Source › mORMot Framework
In the last weeks/months, we worked a lot with FPC.
Delphi is still our main IDE, due to its better debugging experience under
Windows, but we target to have premium support of FPC, on all platforms,
especially Linux.
The new Delphi Linux compiler is out of scope, since it is heavily priced,
its performance is not so good, and ARC broke memory management so would need a
deep review/rewrite of our source code, which we can't afford - since we have
FPC which is, from our
opinion, a much better compiler for Linux.
Of course, you can create clients for Delphi Linux and FMX, as usual, using
the cross-platform
client parts of mORMot. But for server side, this compiler is not
supported, and will probably never be.
2017-10-24
2017-10-24. Open Source › mORMot Framework
After having enjoyed EKON 21 conferences in Köln, some quick post to share material about my presentations. MicroServices: SOLID Meets SOA MicroServices: Event-Driven Design Practical Domain-Driven Design I also included the "Practical DDD" source code in a new sample folder of the mORMot […]
2017-08-10
2017-08-10. Open Source › mORMot Framework
You probably know about our SynLZ compression unit, in pascal and x86 asm, which is very fast for compression with a good compression ratio, and proudly compete with LZ4 or Snappy. It is used in our framework everywhere, e.g. for WebSockets communication, for ECC encrypted file content, or to […]
2017-03-22
2017-03-22. Open Source › mORMot Framework
We are proud to announce compatibility of our mORMot Open Source framework
with the latest Delphi 10.2 Tokyo compiler...
At least for Win32.
For Win64, the compiler was stuck at the end of the compilation, burning 100% of one CPU core...
A bit disappointing, isn't it?
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