Tag - Delphi

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2023-09-08

End Of Live OpenSSL 1.1 vs Slow OpenSSL 3.0

mormotSecurity.jpg, Sep 2023

You may have noticed that the OpenSSL 1.1.1 series will reach End of Life (EOL) next Monday...
Most sensible options are to switch to 3.0 or 3.1 as soon as possible.

mormotSecurity.jpg, Sep 2023

Of course, our mORMot 2 OpenSSL unit runs on 1.1 and 3.x branches, and self-adapt at runtime to the various API incompatibilities existing between each branch.
But we also discovered that switching to OpenSSL 3.0 could led into big performance regressions... so which version do you need to use?

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2023-07-20

The LUTI and the mORMot

RegressTests.png, Jul 2023

Since its earliest days, our mORMot framework did offer extensive regression tests. In fact, it is fully test-driven, and almost 78 million individual tests are performed to cover all its abilities:

RegressTests.png, Jul 2023

We just integrated those tests to the TranquilIT build farm, and its great LUTI tool. So we have now continuous integration tests over several versions of Windows, Linux, and even Mac!
LUTI is the best mORMot's friends these days. :)

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2023-04-19

New Command Line Parser in mORMot 2

For most projects, we want to be able to pass some custom values when starting it.
The command line is then used to add this additional information.

We have ParamStr and ParamCount global functions, enough to retrieve the information. You may also use FindCmdLineSwitch for something more easy to work with.
The Lazarus RTL offers some additional methods like hasOption or getOptionValue or checkOptions in its TCustomApplication class. Their are better, but not so easy to use, and not available on Delphi.

We just committed a new command line parser to our Open Source mORMot 2 framework, which works on both Delphi and FPC, follows both Windows and POSIX/Linux conventions, and has much more features (like automated generation of the help message), in an innovative and easy workflow.

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2023-01-10

mORMot 2 Release Candidate

The mORMot 2 framework is about to be released as its first 2.0 stable version.

The framework feature set should now be considered as sealed for this release.
There is no issue reported still open at github or in the forum.

Please test it, and give here some feedback to fix any problem before the actual release!
We enter a framework code-freeze phase until then.
:-)

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2022-11-26

Modern Pascal is Still in the Race

A recent poll on the Lazarus/FPC forum highlighted a fact: pascal coders are older than most coders. Usually, at our age, we should be managers, not developers. But we like coding in pascal. It is still fun after decades!
But does it mean that you should not use pascal for any new project? Are the language/compilers/libraries outdated?
In the company I currently work for, we have young coders, just out-of-school or still-in-school, which joined the team and write great code!

And a recent thread in this very same forum was about comparing languages to implement a REST server, in C#, Go, Scala, TypeScript, Elixir and Rust.
Several pascal versions are about to be contributed, one in which mORMot shines.

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2022-08-12

New Client for MongoDB 5.1/6 Support

Starting with its version 5.1, MongoDB disabled the legacy protocol used for communication since its beginning.
As a consequence, our mORMot client was not able to communicate any more with the latest versions of MongoDB instances.

Last week, we made a deep rewrite of mormot.db.nosql.mongodb.pas, which changed the default protocol to use the new layout on the wire. Now messages use regular MongoDB Database Commands, with automated compression if needed.

No change is needed in your end-user MongoDB or ORM/ODM code. The upgrade is as simple as update your mORMot 2 source, then recompile.

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2022-05-21

New Async HTTP/WebSocket Server on mORMot 2

The HTTP server is one main part of any SOA/REST service, by design.
It is the main entry point of all incoming requests. So it should better be stable and efficient. And should be able to scale in the future, if needed.

There have always been several HTTP servers in mORMot. You can use the HTTP server class you need.
In mORMot 2, we added two new server classes, one for publishing over HTTP, another able to upgrade to WebSockets. The main difference is that they are fully event-driven, so their thread pool is able to scale with thousands of concurrent connections, with a fixed number of threads. They are a response to the limitations of our previous socket server.

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2022-02-15

mORMot 2 ORM Performance

The official release of mORMot 2 is around the edge. It may be the occasion to show some data persistence performance numbers, in respect to mORMot 1.

For the version 2 of our framework, its ORM feature has been enhanced and tuned in several aspects: REST routing optimization, ORM/JSON serialization, and in-memory and SQL engines tuning. Numbers are talking. You could compare with any other solution, and compile and run the tests by yourself for both framework, and see how it goes on your own computer or server.
In a nutshell, we almost reach 1 million inserts per second on SQLite3, and are above the million inserts in our in-memory engine. Reading speed is 1.2 million and 1.7 million respectively. From the object to the storage, and back. And forcing AES-CTR encryption on disk almost don't change anything. Now we are talking. ;)

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2022-01-22

Three Locks To Rule Them All

To ensure thread-safety, especially on server side, we usually protect code with critical sections, or locks. In recent Delphi revisions, we have the TMonitor feature, but I would rather trust the OS for locks, which are implemented using Windows Critical Sections, or POSIX futex/mutex.

But all locks are not born equal. Most of the time, the overhead of a Critical Section WinAPI or the pthread library is not needed.
So, in mORMot 2, we introduced several native locks in addition to those OS locks, with multi-read/single-write abilities, or re-entrancy.

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2021-12-19

mORMot 2 Generics and Collections

Generics are a clever way of writing some code once, then reuse it for several types.
They are like templates, or compiler-time shortcuts for type definitions.

In the last weeks, we added a new mormot.core.collections.pas unit, which features:

  • JSON-aware IList<> List Storage;
  • JSON-aware IKeyValue<> Dictionary Storage.

In respect to Delphi or FPC RTL generics.collections, this unit uses interfaces as variable holders, and leverage them to reduce the generated code as much as possible, as the Spring4D 2.0 framework does, but for both Delphi and FPC. It publishes TDynArray and TSynDictionary high-level features like indexing, sorting, JSON/binary serialization or thread safety as Generics strong typing.

Resulting performance is great, especially for its enumerators, and your resulting executable size won't blow up as with the regular RTL unit.

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2021-11-16

EKON 25 Slides

EKON 25 at Düsseldorf was a great conference (konference?).

At last, a physical gathering of Delphi developers, mostly from Germany, but also from Europe - and even some from USA! No more virtual meetings, which may trigger the well known 'Abstract Error' on modern pascal coders.
There were some happy FPC users too - as I am now. :)

I have published the slides of my conferences, mostly about mORMot 2.
By the way, I wish we would be able to release officially mORMot 2 in December, before Christmas. I think it starts to be stabilized and already known to be used on production. We expect no more breaking change in the next weeks.

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2021-09-21

Delphi 10.4 / Delphi 11 Alexandria Breaking Changes

The latest revision of Delphi, named Delphi 11 Alexandria, is out.
A lot of new features, some enhanced platforms. Nice!
But it is also for us the opportunity to come back to some breaking changes, which appeared in Delphi 10.4 earlier this year, and are now "officially" part of Delphi 11.

The main breaking change of Delphi 10.4 and later, as reported by mORMot users, is the new lifetime of local variables.
TL&LR: a local variable which is not explicitly declared, but returned by a function may be released as soon as it is not used any more, whereas in the original implementation, it was allocated as a regular local variable, and we could expect its lifetime to remain active up to the end of the function. With Delphi 10.4, it is not the case any more: the compiler could release/clear the local variable sooner, to reduce the allocation pressure.

Idea behind this change is that it may have better register allocation within the function, so it "may" theoretically result in faster code. Not convinced about it, anyway - we will discuss that.
The main thing is that it could break existing code, because it breaks the Delphi compiler expectation since decades.
Some perfectly fine working code would end to work as expected. We have identified several use cases with mORMot which are affected by this change. Since it seems there will be no coming back from Delphi point of view, it is worth a blog article. ;)

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2021-06-26

Embed Small and Optimized Debug Information for FPC

Debug information can be generated by compilers, to contain symbols and source code lines. This is very handy to have a meaningful stack trace on any problems like exceptions, at runtime.

The problem is that debug information can be huge. New code style with generics tends to increase this size into a bloated way...
On Delphi, mormot2tests generates a 4MB .map file;
on FPC, mormot2tests outputs a 20MB .dbg file in DWARF.

For Delphi, we propose our own binary .mab format which reduces this 4MB .map file into a 290KB .mab file since mORMot 1.
Now mORMot 2 can reduce a FPC debug file of 20MB into a 322KB .mab file!
And this .mab information can just be appended to the executable for single-file distribution, if needed, during the build. No need to distribute two files, potentially with synchronization issues.

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2021-05-14

Enhanced HTTP/HTTPS Support in mORMot 2

HTTP(S) is the main protocol of the Internet.
We enhanced the mORMot 2 socket client to push its implementation into more use cases. The main new feature is perhaps WGET-like processing, with hashing, resuming, console feedback, and direct file download.

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2021-05-08

Enhanced Faster ZIP Support in mORMot 2

The .zip format is from last century, back to the early DOS days, but can still be found everywhere. It is even hidden when you run a .docx document, a .jar application, or any Android app!
It is therefore (ab)used not only as archive format, but as application file format / container - even if in this respect using SQLite3 may have much more sense.

We recently enhanced our mormot.core.zip.pas unit:

  • to support Zip64,
  • with enhanced .zip read/write,
  • to have a huge performance boost during its process,
  • and to integrate better with signed executables.

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2021-02-22

OpenSSL 1.1.1 Support for mORMot 2

Why OpenSSL? OpenSSL is the reference library for cryptography and secure TLS/HTTPS communication. It is part of most Linux/BSD systems, and covers a lot of use cases and algorithms. Even if it had some vulnerabilities in the past, it has been audited and validated for business use. Some algorithms  […]

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2021-02-13

Fastest AES-PRNG, AES-CTR and AES-GCM Delphi implementation

Last week, I committed new ASM implementations of our AES-PRNG, AES-CTR and AES-GCM for mORMot 2.
They handle eight 128-bit at once in an interleaved fashion, as permitted by the CTR chaining mode. The aes-ni opcodes (aesenc aesenclast) are used for AES process, and the GMAC of the AES-GCM mode is computed using the pclmulqdq opcode.

Resulting performance is amazing: on my simple Core i3, I reach 2.6 GB/s for aes-128-ctr, and 1.5 GB/s for aes-128-gcm for instance - the first being actually faster than OpenSSL!

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2021-02-12

New AesNiHash for mORMot 2

I have just committed some new AesNiHash32 AesNiHash64 AesNiHash128 Hashers for mORMot 2. They are using AES-NI and SSE4.1 opcodes on x86_64 and i386. This implementation is faster than the fastest SSE4.1 crc32c and with a much higher usability (less collisions). Logic was extracted from the Go  […]

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2020-11-16

mORMot 2 Entering Testing Phase

mormot2test.jpg, Nov 2020

After a lot of work, our mORMot 2 fork is entering its testing phase.

The main /src/core /src/lib /src/net /src/db /src/orm /src/soa /src/app folders of our Source Code repository have been implemented.

mormot2test.jpg, Nov 2020

Please check https://github.com/synopse/mORMot2 for the latest version of the source code. The README.md files on each folder would help you discover the new framework design, and the content of each unit.

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2020-09-09

Data Alignment and Delphi 10.4.1

Some regression has been reported with Delphi 10.4.1 and SynPDF. From the Github issue description: Generating a PDF via VLCCanvas and TPdfDocumentGDI causes access violation when compiled with Delphi 10.4.1 with record field alignment compiler option set to "byte" or "off". When  […]

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