Created
November 13, 2015 22:13
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beating grep
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| $ ls -lah asx.psv | |
| -rw-r--r-- 1 amos staff 59G 13 Nov 18:07 asx.psv | |
| $ time grep -v EntryError asx.psv > /dev/null | |
| real 14m33.885s | |
| user 14m10.081s | |
| sys 0m22.390s | |
| $ time icicle-bench data/example/AsxDictionary.toml asx.psv output.psv | |
| icicle-bench: starting compilation | |
| icicle-bench: compilation time = 34.08s | |
| icicle-bench: starting snapshot | |
| icicle-bench: snapshot time = 278.51s (217.80MB/s) | |
| real 5m12.648s | |
| user 4m41.321s | |
| sys 0m24.160s | |
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this is for computing a bunch of means, and a bunch of "Pearson's product-moment correlation coefficient" on the different fields. the data is scraped from ASX stock prices.
the point is that, even spending 34 seconds compiling and optimising the query program, we are three times faster than grep. I guess for significantly smaller files the compilation overhead would dominate though.