2013-05-24
2013-05-24. Open Source › mORMot Framework
Our SQLite3 engine can now use regular
expression within its SQL queries, by enabling the REGEXP
operator in addition to standard SQL operators (= == != <> IS IN
LIKE GLOB MATCH). It will use the Open Source PCRE library
(bounded since Delphi XE, or available as a separate download) to perform the
queries.
It will enable advanced searches within text columns and our objects, when used as a WHERE clause of our mORMot's ORM.
2013-05-21
2013-05-21. Pascal Programming
Apart from being very slow during compilation, the Delphi NextGen compiler introduced a new memory model, named ARC.
We already spoke about ARC years ago, so please refer to our corresponding blog article for further information, especially about how Apple did introduce ARC to iOS instead of the Garbage Collector model.
About how ARC is to be used in the NextGen compiler, take a look at Marco's blog article, and its linked resources.
But the ARC model, as implemented by Embarcadero, has at least one huge
performance issue, in the way weak
references, and zeroing weak pointers have been implemented.
I do not speak about the general slow down introduced during every class/record
initialization/finalization, which is noticeable, but not a big concern.
If you look at XE4 internals, you will discover a disappointing global lock introduced in the RTL.
2013-05-19
2013-05-19. Pascal Programming
One quick Sunday post, from a comment I wrote in a blog article.
I'm always wondering why a lot of programmers tend to implicitly assume that "the shorter source code, the better".
It is true when it means that with proper code refactoring, making small
objects with dedicated methods, the code of your methods will be smaller.
It is true when you do not like to write as a "Copy & Paste" coder, without
searching to put common code in shared places.
But is it true at the language level?
I mean, is it just because your ARC or GC model allow you not to manage the
object memory, that it is always better?
Just some ideas...
2013-05-11
2013-05-11. Pascal Programming
When I first read the technical white paper covering all of the language changes in XE4 for mobile development (tied to the new ARM LLVM-based Delphi compiler), I have to confess I was pretty much confused.
Two great mORMot users just asked for XE4/iOS support of mORMot.
Win32/Win64 support for XE4 will be done as soon as we got a copy of
it.
I suspect the code already works, since it was working as expected with XE3,
and we rely on our own set of low-level functions for most internal work.
But iOS-targetting is more complex, due to the NextGen compiler, mainly.
