datengarten thumbnails & new folder structure

content/datengarten/31/index.md

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+---
+categories: ["Datengarten"]
+series: "Datengarten"
+no: 31
+title: "Datengarten 31"
+subtitle: "Dem Compiler beim Optimieren zuschauen"
+date: 2009-06-25T00:00:00+02:00
+event:
+  start: 2009-06-25T20:00:00+02:00
+  end:   2009-06-25T22:00:00+02:00
+location: CCCB
+speaker: hannes
+language: de
+streaming: false
+tags: ["Datengarten", "Veranstaltung"]
+---
+
+**A tool for debugging compiler optimizations and type inference** (in
+deutscher Sprache)
+
+Abstract
+--------
+
+The focus of this talk will be type theory (type system and type
+inference), applied to a dynamic language (Slides of a previous talk are
+\[6\]). A side-effect during working on this topic was the development
+of a visualization tool:
+
+This tool is a Java application which visualizes the control and data
+flow graph of the intermediate representation of Open Dylan \[1\]
+(former DylanWorks, Harlequin Dylan, Functional Developer) and animates
+optimizations. The Open Dylan compiler was extended with hooks to send
+control flow and data flow changes via TCP/IP to the Java application.
+The justification why the visualization is in Java is because I couldn't
+find a decent graph layouting and animation library with an API. The
+graph library used is yFiles \[2\]. The Java code \[3\] consists of 2000
+lines of code, the compiler hooks were about 250 lines of code.
+Interactive application can be viewed at \[5\]. The communication
+protocol in use are S-expressions, in the same marshalling format as
+swank (the slime backend protocol).
+
+An example for this work is a visualized map(method(x) x end, \#(1)),
+available at \[4\] (data flow nodes and edges are pink).
+
+Links
+-----
+
+1. <http://www.opendylan.org/>
+2. <http://www.yworks.com/en/products_yfiles_about.html>
+3. <http://www.opendylan.org/cgi-bin/viewvc.cgi/branches/opendylan-visualization/FlowGraphVisualization/src/>
+4. <http://www.opendylan.org/~hannes/yworks/test4.avi>
+5. <http://visualization.dylan-user.org/>
+6. <http://www.opendylan.org/~hannes/ph-neutral.pdf>
+