jm + collections   9

Download 67,000 Historic Maps (in High Resolution) from the Wonderful David Rumsey Map Collection | Open Culture
You do not need to be a Stanford student or faculty or staff member to access the vast treasures of the Rumsey Map collection, nor do you need to visit the university or its new Center. Since 1996, the Rumsey collection’s online database has been open to all, currently offering anyone with an internet connection access to 67,000 maps from all over the globe, spanning five centuries of cartography.


(via Oisin)
via:oisin  maps  art  graphics  open-access  mapping  history  david-rumsey  collections 
13 days ago by jm
Koloboke Collections
Interesting new collections lib for Java 6+; generates Map-like and Set-like collections at runtime based on the contract annotations you desire. Fat (20MB) library-based implementation also available
collections  java  koloboke  performance  coding 
may 2016 by jm
OpenHFT/hftc · GitHub
This is a yet another Java collections library of primitive specializations. Java 6+. Apache 2.0 license. Currently only hash sets and hash maps are implemented.
openhft  performance  java  jvm  collections  asl  hashsets  hashmaps  data-structures 
august 2014 by jm
Big Memory, Part 4
good microbenchmarking of a bunch of Java collections; Trove, fastutil, PCJ, mahout-collections, hppc
java  collections  benchmarks  performance  speed  coding  data-structures  optimization 
june 2013 by jm
fastutil
fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files. It is free software distributed under the Apache License 2.0. It requires Java 6 or newer.


used by Facebook (along with Apache Giraph, Netty, Unsafe) to speed up "weekend Hive jobs" to "coffee breaks". http://www.slideshare.net/nitayj/2013-0603-berlin-buzzwords
via:highscalability  facebook  giraph  optimization  java  speed  fastutil  collections  data-structures 
june 2013 by jm
totallylazy
Clojure-style lazy functional collections (via QCon via Caro)
via:caro  collections  java  functional  lazy-loading  lazy-computation  lazy  clojure 
march 2013 by jm
Scala 2.8 Collections API -- Performance Characteristics
wow. Every library vending a set of collection types should have a page like this
collections  scala  performance  reference  complexity  big-o  coding 
january 2013 by jm
Humblog - Philip Kirwan Ripped Off My iPhone App Content
ouch, nasty allegations. Strikes me that there's a chicken/egg problem: scraping the Dublin Bus website to build a database which you then sell as part of a commercial iPhone app is probably pretty shaky ground to start with
ip  databases  collation  collections  dublin-bus  iphone  apps  scraping  from delicious
january 2010 by jm
Why WeakHashMap Sucks
'SoftReferences are the cheap, crappy caching mechanism [...] perfect for when you'd like your cache to be cleared at random times and in random order.'
softreferences  weakreferences  weak  references  gc  java  jvm  caching  hash  memory  collections  vm  weakhashmap  via:spyced  from delicious
september 2009 by jm

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