Switched to ppx.
Minor adjustments to the command line of profiler_tool.exe:
Make '-%' an alias for '-percentile'
Make '-percentile' accept a comma-separated list of numbers
Add '-median' argument that is equivalent to '-percentile 50'
Changed delta timers and probes so they record the total amount of time/value change between each start and pause.
Solved a problem in which OCaml 4.02 was optimizing away benchmarks, making them meaningless.
fixed legacy format string
Added support for saving inline benchmark measurements to tabular files for easy loading into Octave.
bench.mli's generated docs and added some usage examples.
This also partly satisfies issue #3.
Added the ability to create groups of benchmarks with a common prefix.
For example, the prefix "Perf" below is created in created using
let command = Bench.make_command [ Bench.Test.create ~name:"Time.now" (fun () -> ignore (Time.now ())); ... Bench.Test.create_group ~name:"Perf" [ Bench.Test.create ~name:"TSC.now" ...
and the output shows:
Estimated testing time 7s (7 benchmarks x 1s). Change using -quota SECS. ┌───────────────────────────────────────────┬──────────┬─────────┬────────────┐ │ Name │ Time/Run │ mWd/Run │ Percentage │ ├───────────────────────────────────────────┼──────────┼─────────┼────────────┤ │ Time.now │ 41.38ns │ 2.00w │ 16.72% │ │ Calibrator.calibrate │ 247.42ns │ 32.00w │ 100.00% │ │ Perf/TSC.now │ 7.84ns │ │ 3.17% │ │ Perf/TSC.to_time │ 9.35ns │ 2.00w │ 3.78% │ │ Perf/TSC.to_time (TSC.now ()) │ 13.22ns │ 2.00w │ 5.34% │ │ Perf/TSC.to_nanos_since_epoch │ 10.83ns │ │ 4.38% │ │ Perf/TSC.to_nanos_since_epoch(TSC.now ()) │ 14.86ns │ │ 6.00% │ └───────────────────────────────────────────┴──────────┴─────────┴────────────┘
Fixed a bug in
Core_benchwhere the linear regression was sometimes supplied with spurious data.
This showed up when doing custom regressions that allow for a non-zero y-intercept.
Exposed an extensible form of
make_commandso that inline-benchmarking and the other tools can add more commandline flags.
A significant rewrite of
The rewrite provides largely the same functionality as the older version. The most visible external change is that the API makes it clear that
Core_benchperforms linear regressions to come up with its numbers. Further, it allows running user-specified multivariate regressions in addition to the built in ones.
The underlying code has been cleaned up in many ways, some of which are aimed at improving the implementation of inline benchmarking (the
BENCHsyntax, which has not yet been released).
Columns that have a
+prefix are now always displayed, whereas columns that don't are displayed only if they have meaningful data.
Added the ability to reload saved metrics (benchmark test data) so that bench can re-analyze them.
Added support for additional predictors like minor/major GCs and compactions, using multi-variable linear regression.
Replaced linear regression with multi-variable linear regression. The original algorithm estimated the cost of a function
fby using a linear regression of the time taken to run
fvs the number of runs. The new version adds the ability to include additional predictors such as minor GCs, compactions etc.
This allows a more fine-grained split-up of the running costs of a function, distinguishing between the time spent actually running
fand the time spent doing minor GCs, major GCs or compactions.
Added a forking option that allows benchmarks to be run in separate processes.
This avoids any influence (e.g. polluting the cache, size of live heap words) they might otherwise have on each other.
-saveto output compaction information.
Added indexed tests.
These are benchmarks of the form
int -> unit -> unit, which can be profiled for a list of user specified
Report compaction stats
Added R^2 error estimation.
Adding this metric should give us a sense of how closely the given values fit a line. Even dots that are fairly scattered can give tight confidence intervals. We would like to have to number to have a sense of how much noise we have.