[PD] [PD-dev] abstraction caching

[Luke Iannini]

2008/10/1 Claude Heiland-Allen <claudiusmaximus at goto10.org>:
> Benchmarking an Abstraction Cache for Pd
> ========================================
>
> I implemented a rudimentary abstraction caching mechanism for Miller
> Puckette's pd-0.41-4, which stores the parsed text ("binbuf") associated
> with the class name instead of looking for files to load every time it
> is instantiated.
>
>
> Benchmark Mechanism
> -------------------
>
> Run 4 times, discarding first report:
> $ time pd -open layer_2.pd -send "; pd quit" &>/dev/null
>
> layer_2.pd contains 99 layer_1.pd contains 99 layer_0.pd,
> total 9901 = 9801 layer 0 + 99 layer 1 + 1 layer 0
>
>
> Results: Without Cache
> ----------------------
>
> real    0m0.524s
> user    0m0.260s
> sys     0m0.256s
>
> real    0m0.530s
> user    0m0.224s
> sys     0m0.276s
>
> real    0m0.527s
> user    0m0.224s
> sys     0m0.296s
>
>
> Results: With Cache
> -------------------
>
> real    0m0.082s
> user    0m0.068s
> sys     0m0.004s
>
> real    0m0.148s
> user    0m0.120s
> sys     0m0.008s
>
> real    0m0.085s
> user    0m0.052s
> sys     0m0.012s
>
>
> Conclusion
> ----------
>
> Abstraction cache gives a speed boost of more than 500% when loading
> patches containing a large number of abstractions.

Claudius, this is awesome.  I'm going to build this later and see how
it does with my stuff, which has become a nightmare to work with (5-10
layers of depth, tons of instances, 3-15 minute loadtimes) (of course,
it's sufficiently fun after loading to engender my patience thus far :
)).

I'll post my results
Best
Luke


>
>
> Further Work
> ------------
>
> The main drawback (and the easiest issue to resolve) of the current
> implementation is that once an abstraction is in the cache, it stays
> there forever, no matter if the file is modified within or without Pd.
> This could be fixed by flushing the cache immediately after the patch
> is loaded (perhaps using Pd's scheduler).
>
> Another drawback are that abstractions in different directories with
> the same file name can clobber each other - the first one loaded is the
> "one true abstraction" with that name, resolving this issue will be more
> difficult.
>
>
>
> #N canvas 0 0 450 300 10;
> #X obj 28 24 inlet;
> #X obj 33 262 outlet;
>
> #N canvas 0 0 450 300 10;
> #X obj 8 9 layer_0;
> #X obj 8 29 layer_0;
> #X obj 8 49 layer_0;
> #X obj 8 69 layer_0;
> #X obj 8 89 layer_0;
> #X obj 8 109 layer_0;
> #X obj 8 129 layer_0;
> #X obj 8 149 layer_0;
> #X obj 8 169 layer_0;
> #X obj 8 189 layer_0;
> #X obj 8 209 layer_0;
> #X obj 8 230 layer_0;
> #X obj 8 250 layer_0;
> #X obj 8 270 layer_0;
> #X obj 68 9 layer_0;
> #X obj 68 29 layer_0;
> #X obj 68 49 layer_0;
> #X obj 68 69 layer_0;
> #X obj 68 89 layer_0;
> #X obj 68 109 layer_0;
> #X obj 68 129 layer_0;
> #X obj 68 149 layer_0;
> #X obj 68 169 layer_0;
> #X obj 68 189 layer_0;
> #X obj 68 209 layer_0;
> #X obj 68 230 layer_0;
> #X obj 68 250 layer_0;
> #X obj 68 270 layer_0;
> #X obj 128 9 layer_0;
> #X obj 128 29 layer_0;
> #X obj 128 49 layer_0;
> #X obj 128 69 layer_0;
> #X obj 128 89 layer_0;
> #X obj 128 109 layer_0;
> #X obj 128 129 layer_0;
> #X obj 128 149 layer_0;
> #X obj 128 169 layer_0;
> #X obj 128 189 layer_0;
> #X obj 128 209 layer_0;
> #X obj 128 230 layer_0;
> #X obj 128 250 layer_0;
> #X obj 128 270 layer_0;
> #X obj 188 9 layer_0;
> #X obj 188 29 layer_0;
> #X obj 188 49 layer_0;
> #X obj 188 69 layer_0;
> #X obj 188 89 layer_0;
> #X obj 188 109 layer_0;
> #X obj 188 129 layer_0;
> #X obj 188 149 layer_0;
> #X obj 188 169 layer_0;
> #X obj 188 189 layer_0;
> #X obj 188 209 layer_0;
> #X obj 188 230 layer_0;
> #X obj 188 250 layer_0;
> #X obj 188 270 layer_0;
> #X obj 248 9 layer_0;
> #X obj 248 29 layer_0;
> #X obj 248 49 layer_0;
> #X obj 248 69 layer_0;
> #X obj 248 89 layer_0;
> #X obj 248 109 layer_0;
> #X obj 248 129 layer_0;
> #X obj 248 149 layer_0;
> #X obj 248 169 layer_0;
> #X obj 248 189 layer_0;
> #X obj 248 209 layer_0;
> #X obj 248 230 layer_0;
> #X obj 248 250 layer_0;
> #X obj 248 270 layer_0;
> #X obj 308 9 layer_0;
> #X obj 308 29 layer_0;
> #X obj 308 49 layer_0;
> #X obj 308 69 layer_0;
> #X obj 308 89 layer_0;
> #X obj 308 109 layer_0;
> #X obj 308 129 layer_0;
> #X obj 308 149 layer_0;
> #X obj 308 169 layer_0;
> #X obj 308 189 layer_0;
> #X obj 308 209 layer_0;
> #X obj 308 230 layer_0;
> #X obj 308 250 layer_0;
> #X obj 308 270 layer_0;
> #X obj 368 9 layer_0;
> #X obj 368 29 layer_0;
> #X obj 368 49 layer_0;
> #X obj 368 69 layer_0;
> #X obj 368 89 layer_0;
> #X obj 368 109 layer_0;
> #X obj 368 129 layer_0;
> #X obj 368 149 layer_0;
> #X obj 368 169 layer_0;
> #X obj 368 189 layer_0;
> #X obj 368 209 layer_0;
> #X obj 368 230 layer_0;
> #X obj 368 250 layer_0;
> #X obj 368 270 layer_0;
>
> #N canvas 0 0 450 300 10;
> #X obj 8 9 layer_1;
> #X obj 8 29 layer_1;
> #X obj 8 49 layer_1;
> #X obj 8 69 layer_1;
> #X obj 8 89 layer_1;
> #X obj 8 109 layer_1;
> #X obj 8 129 layer_1;
> #X obj 8 149 layer_1;
> #X obj 8 169 layer_1;
> #X obj 8 189 layer_1;
> #X obj 8 209 layer_1;
> #X obj 8 230 layer_1;
> #X obj 8 250 layer_1;
> #X obj 8 270 layer_1;
> #X obj 68 9 layer_1;
> #X obj 68 29 layer_1;
> #X obj 68 49 layer_1;
> #X obj 68 69 layer_1;
> #X obj 68 89 layer_1;
> #X obj 68 109 layer_1;
> #X obj 68 129 layer_1;
> #X obj 68 149 layer_1;
> #X obj 68 169 layer_1;
> #X obj 68 189 layer_1;
> #X obj 68 209 layer_1;
> #X obj 68 230 layer_1;
> #X obj 68 250 layer_1;
> #X obj 68 270 layer_1;
> #X obj 128 9 layer_1;
> #X obj 128 29 layer_1;
> #X obj 128 49 layer_1;
> #X obj 128 69 layer_1;
> #X obj 128 89 layer_1;
> #X obj 128 109 layer_1;
> #X obj 128 129 layer_1;
> #X obj 128 149 layer_1;
> #X obj 128 169 layer_1;
> #X obj 128 189 layer_1;
> #X obj 128 209 layer_1;
> #X obj 128 230 layer_1;
> #X obj 128 250 layer_1;
> #X obj 128 270 layer_1;
> #X obj 188 9 layer_1;
> #X obj 188 29 layer_1;
> #X obj 188 49 layer_1;
> #X obj 188 69 layer_1;
> #X obj 188 89 layer_1;
> #X obj 188 109 layer_1;
> #X obj 188 129 layer_1;
> #X obj 188 149 layer_1;
> #X obj 188 169 layer_1;
> #X obj 188 189 layer_1;
> #X obj 188 209 layer_1;
> #X obj 188 230 layer_1;
> #X obj 188 250 layer_1;
> #X obj 188 270 layer_1;
> #X obj 248 9 layer_1;
> #X obj 248 29 layer_1;
> #X obj 248 49 layer_1;
> #X obj 248 69 layer_1;
> #X obj 248 89 layer_1;
> #X obj 248 109 layer_1;
> #X obj 248 129 layer_1;
> #X obj 248 149 layer_1;
> #X obj 248 169 layer_1;
> #X obj 248 189 layer_1;
> #X obj 248 209 layer_1;
> #X obj 248 230 layer_1;
> #X obj 248 250 layer_1;
> #X obj 248 270 layer_1;
> #X obj 308 9 layer_1;
> #X obj 308 29 layer_1;
> #X obj 308 49 layer_1;
> #X obj 308 69 layer_1;
> #X obj 308 89 layer_1;
> #X obj 308 109 layer_1;
> #X obj 308 129 layer_1;
> #X obj 308 149 layer_1;
> #X obj 308 169 layer_1;
> #X obj 308 189 layer_1;
> #X obj 308 209 layer_1;
> #X obj 308 230 layer_1;
> #X obj 308 250 layer_1;
> #X obj 308 270 layer_1;
> #X obj 368 9 layer_1;
> #X obj 368 29 layer_1;
> #X obj 368 49 layer_1;
> #X obj 368 69 layer_1;
> #X obj 368 89 layer_1;
> #X obj 368 109 layer_1;
> #X obj 368 129 layer_1;
> #X obj 368 149 layer_1;
> #X obj 368 169 layer_1;
> #X obj 368 189 layer_1;
> #X obj 368 209 layer_1;
> #X obj 368 230 layer_1;
> #X obj 368 250 layer_1;
> #X obj 368 270 layer_1;
>
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