[DUG] Scripting languages

[Richard Vowles]

Generally when you ask for something, Bold will load the whole row (all
fields) into memory - and people have a tendency to ask for a lot of
stuff. 

Bold also layers an intelligent cache on the top of the database, so it
holds onto objects and it was a little hard to evict them from memory
unless you actually knew what you were doing (and most people never got
that far). But it was also very cool because you just navigated around
your object model and it would just grab the objects as you requested
them. But it wasn't cool if you wanted to grab the entire object graph
in one swoop from the database - and you couldn't replace that (you can
in ECO - you can not only selectively use SQL or OCL, but you can do
lazy loading or force loading or replace parts of the persistence engine
if you like). 

Bold made a lot very easy, but it also meant you had to do it their way.
You had to use a bold_id for example - no generators or identity fields.
ECO has a mapper so you can use an existing database. You can even use
stored procedures if you want to - you have to override the persistence
mapper to achieve this though.

Bold is win32. ECO is .NET. ECO is designed with a lot of lessons learnt
- I just wish they'd back-port it to win32.

Richard


---
Richard Vowles, Solutions Architect, Borland New Zealand
email: richard.vowles at borland.com
phone: +64-9-9184573
cell: +64-21-467747
other: MSN richard.vowles at borland.com, skype: rvowles
blog: http://www.usergroup.org.nz/blogs/selectBlog.html?id=39769

-----Original Message-----
From: delphi-bounces at ns3.123.co.nz [mailto:delphi-bounces at ns3.123.co.nz]
On Behalf Of Todd Martin
Sent: Wednesday, 31 May 2006 3:12 p.m.
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Scripting languages

I've never used BOLD. What is the main cause of the performance
problems? 
Multiple table joins to represent a class heirarchy?


On Tue, 30 May 2006 21:23, peter at webcentre.co.nz wrote:
> And "Makes good software" is a rather important criterion. There's no 
> end of crap that can be churned out in the name of good design, with 
> tools tailored for that objective. Why is why I become amused when I 
> hear people praising Bold, for example. Beautiful designs. Useless 
> performance in real-life applications.
>
> So please don't mention Bold too often if you want to lure me towards 
> ECO, Richard <G>.
>
> cheers,
> peter
>
>
> _______________________________________________
> Delphi mailing list
> Delphi at ns3.123.co.nz
> http://ns3.123.co.nz/mailman/listinfo/delphi
_______________________________________________
Delphi mailing list
Delphi at ns3.123.co.nz
http://ns3.123.co.nz/mailman/listinfo/delphi