Profile

Cover photo
Waldemar Kornewald
Works at pentotype
403 followers|22,506 views
AboutPostsPhotosVideos+1's

Stream

Waldemar Kornewald

Shared publicly  - 
 
Now this is pretty significant for web developers.
 
I've been meaning to do this screencast for weeks, ever since I first showed the screenshot of SuperDevMode and SourceMaps working. +Brian Slesinsky has been working non-stop polishing up SuperDevMode and now it's a joy to use, I figured it was time to give you small demo in real time of how SourceMaps work in Chrome. Edit: I forgot to mention that Firefox will also support SourceMaps.
2
2
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
Amazon DynamoDB is a new hosted NoSQL service. It's replicated across at least 3 data centers, scales automatically, and has low latency. Really nice.

But the query capabilities are very limited (comparable to simple key-value stores without secondary indexes). That means extra work on your side to emulate secondary indexes - which you'd get for free with other NoSQL solutions. I wish they'd at least provide manually specified secondary indexes (similar to App Engine), so they don't need to index everything, but still make development very easy.

Also, I'm not sure if the costs are acceptable because the pricing is difficult to compare to other services and hosting on your own servers. For example, is $1/GB acceptable? App Engine's datastore is also replicated across at least 3 data centers, so how does DynamoDB's $1/GB compare to App Engine's $0.24/GB? Is the latency so much lower that it causes the 4x higher cost? Does App Engine have a higher overhead, thus causing much higher costs than the $0.24/GB might suggest?

At least, DynamoDB looks like a more attractive alternative to SimpleDB. Complexity-wise it makes scaling much easier, but queries/indexes much more difficult.

SimpleDB vs DynamoDB vs host some other NoSQL DB yourself? Pick the lesser evil. However, if we had DynamoDB with secondary indexes that would be really really interesting.
4
3
Tom Brander's profile photo
 
Nice summary, Thanks! Hope all is well..
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
Nice talk about inbound marketing:
http://hackersandfounders.tv/RDmt/rand-fishkin-inbound-marketing-for-startups/

And a short summary comment of an important question on Hacker News:
http://news.ycombinator.com/item?id=3303046
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
Slightly frightening and awesome at the same time. :)
1
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
Brian Quinlan originally shared:
 
The new App Engine billing model is now live:
http://www.google.com/enterprise/cloud/appengine/pricing.html

If you have a problem with your billing or quota please send an e-mail to:
appengine_updated_pricing@google.com

We are also monitoring:
http://groups.google.com/group/google-appengine
http://code.google.com/p/googleappengine/issues/list
and Stack Overflow
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
5
5
Add a comment...
Have him in circles
403 people
M Nasimul Haque's profile photo
Martino A. Sabia's profile photo
Mitchell Garnaat's profile photo

Waldemar Kornewald

Shared publicly  - 
 
We've published a video about our wireframing software and are asking for feedback on Hacker News. Please join the discussion.
5
3
Add a comment...

Waldemar Kornewald

Shared publicly  - 
2
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
Yay. App Engine 1.6.1 will introduce three different frontend instance classes, so you can have more RAM and CPU performance. Really nice.

You can now also play with the experimental file conversion API (e.g. .doc => .pdf) which even features OCR for images! How cool is that!?

And finally the dev_appserver gets a nice speed bump. Still, it's single-threaded which causes headaches with multiple HTTP connections blocking each other. Let's hope they'll make it multi-threaded real soon now.
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
Finally the PyPy team is playing with solutions for reducing JIT warmup time by saving the JIT state. Day-dreaming: Maybe we could enable aggressive/costly JIT optimizations, run our code, save the JIT state, and then reduce optimizations from "aggressive" to "normal" in the release version, so the JIT won't take up most of the processing time.

As always, there are lots of other cool optimizations. Click the link to see the complete update.
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
App Engine SDK 1.6.0 released with dev_appserver support for Python 2.7
1
1
Add a comment...

Waldemar Kornewald

Shared publicly  - 
 
How you can take advantage of App Engine's improved index handling. Many queries now work without a special index - and especially without an exploding index. Beware that such queries might sometimes be significantly slower. In the worst case you get a timeout. You'll have to define indexes more consciously to get the best compromise between performance and write cost.
1
1
Add a comment...
People
Have him in circles
403 people
M Nasimul Haque's profile photo
Martino A. Sabia's profile photo
Mitchell Garnaat's profile photo
Work
Occupation
Entrepreneur, developer
Employment
  • pentotype
    Entrepreneur, 2011 - present
Story
Introduction
Entrepreneur: Creating a software that makes wireframes and diagrammy sketches damn easy. Soon we'll publish more info on http://www.pentotype.com

Open-source developer: Created Django-nonrel and its App Engine database backend, django-mediagenerator, PyMeta 2, app-engine-patch, etc. Contributing to pyjs/pyjamas compiler. Also worked on the Haiku project for almost five years. More on http://www.allbuttonspressed.com
Basic Information
Gender
Male
Waldemar Kornewald's +1's are the things they like, agree with, or want to recommend.
This 28-Year-Old Is Making Sure Credit Cards Won't Exist In The Next Few...
www.sfgate.com

There's a tiny 12-person startup churning out of Des Moines, Iowa that most people have never heard of. Dwolla was founded by 28-year-old Be