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Justin Ethier 2017-06-15 23:50:54 -04:00
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_posts/2017-06-05-A-Massive-Speed-Improvement-Lessons-in-Profiling-and-Debugging.md
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---
layout: post
title: A Massive Speed Improvement - Lessons in Profiling and Debugging
title: Using the C Profiler and Debugger with Cyclone Scheme
excerpt: While going through a new run of the R7RS benchmarks from Larceny, I noticed Cyclone performed significantly worse than other schemes on the tail benchmark.
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While going through a new run of the [R7RS benchmarks from Larceny](http://www.larcenists.org/benchmarksGenuineR7Linux.html), I noticed Cyclone performed significantly worse than other schemes on the tail benchmark. Certainly when testing locally the results are less than impressive:
While going through a new run of the [R7RS benchmarks from Larceny](http://www.larcenists.org/benchmarksGenuineR7Linux.html), I noticed Cyclone performed significantly worse than other schemes on the tail benchmark. Certainly when testing locally the results are disappointing:
[justin@justin-pc r7rs-benchmarks]$ ./bench cyclone tail
@ -192,4 +192,4 @@ After rebuilding with this fix we can re-run the tail benchmark:
user 0m0.540s
sys 0m0.187s
Whoa! Remember the older code took over 32 seconds to finish? Now it finishes in less than a second. Not bad.
Whoa! Remember how the older code took over 32 seconds to finish? Now it finishes in less than a second. Not bad.