:cost is the mean time of 100k executions with instrumentation divided by the mean time without instrumentation.
:popularity is the frequency from this blog article: https://lispcast.com/100-most-used-clojure-expressions/
:penalty is the product of the above
One could now say: I want to instrument all core specs with a penalty lower than x.
| :fdef | :penalty | :cost | :popularity |
|---|---|---|---|
| clojure.core/= | 19657291 | 107 | 183713 |
| clojure.core/apply | 4141538 | 134 | 30907 |
| clojure.core/assoc | 1606825 | 55 | 29215 |
| clojure.core/filter | 1378077 | 127 | 10851 |
| clojure.core/get | 1261196 | 68 | 18547 |
| clojure.core/count | 1232380 | 43 | 28660 |
| clojure.core/first | 1139430 | 30 | 37981 |
| clojure.core// | 409683 | 51 | 8033 |
| clojure.core/every? | 269154 | 57 | 4722 |
| clojure.core/juxt | 88560 | 82 | 1080 |
| clojure.core/fnil | 76712 | 86 | 892 |
| :fdef | :penalty | :cost | :popularity |
|---|---|---|---|
| cljs.core/= | 22412986 | 122 | 183713 |
| cljs.core/assoc | 2512490 | 86 | 29215 |
| cljs.core/get | 2429657 | 131 | 18547 |
| cljs.core/first | 1329335 | 35 | 37981 |
| cljs.core// | 1261181 | 157 | 8033 |
| cljs.core/filter | 868080 | 80 | 10851 |
| cljs.core/count | 831140 | 29 | 28660 |
| cljs.core/every? | 188880 | 40 | 4722 |
| cljs.core/fnil | 24976 | 28 | 892 |
| cljs.core/juxt | 23760 | 22 | 1080 |