Saturday, August 4, 2012

8 years of Concept

It's been 8 years from the first working version of Concept. Now, it's mature, stable, feature rich and used in production in over 200 applications.

As usual lots of bug-fixes, and new features:
  • a bug in MySQL interface library that caused a crash when reading blobs of considerable size
  • UDP socket support
  • New multi-threading core library (uses the same code base - it must be compiled with -DSIMPLE_MULTI_THREADING). With this option you can create applications that are writing to the same variables without any need of semaphores. The speed penalty for non-threaded scripts is under 5% and but when running a multi-threaded script, the penalty can range from 5% to 100% depending on number of memory writes. For usual applications is about 6% to 10%. Also, there is no memory overhead.
  • Faster Garbage Collector (hundreds of time faster) by replacing the pointer list with std::set. - About 7% less memory used. The optimization is made on variables, 32 bits less memory used by each string variables and 64 bits less for each non-string variable.
  • SIP stack library ported to Concept (work in progress) Now, the really cool new feature is in GyroGears. For every generated application it automatically generates the migration script for SQL-based database. NoSQL is to come, and automatic migration from SQL to NoSQL. The problem with NoSQL (MongoDB) is that it uses a different id-system, and the migration cannot be done one to one. Now, you can move from one server to another and back in a few minutes. It supports MySQL, PostgreSQL, SQLite, NuoDB, ODBC amd Firebird (via ODBC). For migration, you just run the required script in migrate.prev folder (ServerRoot/MyProjects/YourAppName/migrate.prev). 

Here's a multi-threading example using the concept MT core - as you will see, no semaphore are used for threads accessing the same variables.

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