O technologii i biznesie naszym zdaniem
Archive for czerwiec, 2010
Time to speed your website – SparkUp session
czerwca 1st
One of the session on SparkUp conference was devoted to optimization of performance of websites.
Best practises I would like to remind for everyone who creates for web that were discussed.
Minimize HTTP Requests
- connect javascript files and
- use css sprite
Minimize transferred data.
- Minimize css, js and html files,
- use gzip compression
- use caching – for elements that do not change often use header expires,set it for one year
- optimize jpegs- you can often make then 50 % size smaller without any visible loss. You can do it by using tools like JpegTran or Smush.it
- optimize png – use png8 when possible
Check also Best Practises for Speeding Up your website
Strongly recommend to use tools below
- Firebug – tool for web developement
- YSlow analyses web pages and suggests ways to improve their performance
- PageSpeed gives you hint how to optimalize loading time for your webpage
- JpegTran optimizes jpg
- Smush.it optimizes all jpgs at once
user experience and design on SparkUp
czerwca 1st
25th of May, quite unexpectedly cause I decided two days before I attended SparkUp conference. I was mostly interested in Ux/Web design and till that time, my knowledge in this subject was rather intuitive.
First session I was interested in was lead by Andy Budd. Persuasive Design: Encouraging Your Users To do What You Want Them To Do. Andy told us how our natural behaviours are used to make us buy the product. He went through some persuasion techniques used by advertisers, brands, supermarkets and other people. There is scary amount of those…
He gave examples how those techniques are used in real world and online. Most of us is so used to appearance and behaviour of popular websites that we do not realize that those tricks are used almost everywhere on web !
- Trust in authority – Professional look- white, blue green for webpage of respected medical companies
- Layout and Positioning – using colors, size, positions to emphasize what you would like your user do on your website
- Social Proof – People prefer services where there is already many users- make at least the impression that your service is popular
- Loss Aversion – Last day of promotion, only till the end of the week you pay for our service half price
- Likeability and Gifting – Make people to like your service by for example giving them scores, good rates – people like being rewarded somehow , they like to get sth free : Pay 20 and get 5 for free!
- Reciprocity
Nice study – go via amazon, basecamp, facebook etc and check what they did to make us do what they want 
The speaker of second session Marek Kasperski concentrate on people behaviour on webpage. The tiltle of this session was Mental Models. He was giving advices how to make UI most friendly for users, there was many issues he mentioned, most examples were about e-commerce. he showed proper and wrong designs. Below some facts I remember:
- mind is selective, always trying to find only exact information and it’s blind for the rest (Banner blindness) Help users find what they want – by contrast colours, good filtering of information, group similar information)
- when you design your website try to think like future user
- use colours culturally directed for your website users
- do not leave user with no information when long response
I bought his book Projektowanie stron WWW (as far as I know only in polish language), I will know more.
Wnioski i ciekawostki po GeeCON
czerwca 1st
Wszyscy programiści w Espeo mieli podsumowanie konferencji, na którym omówione zostały ciekawostki, których się dowiedzieliśmy oraz wnioski na przyszłość także technologie i rozwiązania, którym warto się przyjrzeć. Poniżej krótka lista, która wypisaliśmy
- ClusterJPA – narzędzie do obsługi klastra w oparciu o MySQL i JPA
- Spring ROO – dynamicznie się rozwija, wykorzsytywać w projektach springowych
- HPPC – Biblioteka do wydajnych kolekcji typów prymitywnych
- Eclipse RAP webowa wersja Eclipse RCP
- Wykorzystywanie komet do serwisów odświeżanych w czasie rzeczywistym. Wsparcie dla GWT oraz Grails
- Gradle – sprawdzic zamiast Maven’a, wydaje sie być bardziej elastyczny, także dlatego, że oparty jest o Groovy
- Akka lib – przykład wykorzystania aktorów dla współbiezności
- Project Coin – JDK 7 i małe zmiany w języku
- IBM dostarcza zestaw narzędzi dla tuning’u wydajności w javie
- Eclipse memory analyzer jako narzędzie do analizy wydajności aplikacji
- Współbieżność w Groovy z wykorzystaniem biblioteki GPars
- statyczna analiza kodu – zastosowanie JSR-308
- Apache Camel – narzędzie do zastosowania w projektach integracyjnych, implementuje wzorce z książki Enterprise Integration Patterns
- Obserwować rozwój Griffon’a i zastosować do projektów java desktop / swing