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Merge pull request #60 from KrzysiekJ/benchmarks
Vector shrinking is inefficient
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%% Copyright (c) 2018 Krzysztof Jurewicz | ||
%% | ||
%% Licensed under the Apache License, Version 2.0 (the "License"); | ||
%% you may not use this file except in compliance with the License. | ||
%% You may obtain a copy of the License at | ||
%% | ||
%% http://www.apache.org/licenses/LICENSE-2.0 | ||
%% | ||
%% Unless required by applicable law or agreed to in writing, software | ||
%% distributed under the License is distributed on an "AS IS" BASIS, | ||
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
%% See the License for the specific language governing permissions and | ||
%% limitations under the License. | ||
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-module(triq_bench_tests). | ||
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-include_lib("triq/include/triq.hrl"). | ||
-include_lib("eunit/include/eunit.hrl"). | ||
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-define( | ||
LET_PROF(Prof, FunCall, Assertions), | ||
begin | ||
_ = cprof:start(), | ||
_ = FunCall, | ||
_ = cprof:pause(), | ||
Prof = cprof:analyse(), | ||
_ = cprof:stop(), | ||
Assertions | ||
end). | ||
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-spec call_count( | ||
mfa(), | ||
{integer(), | ||
list( | ||
{Mod :: atom(), | ||
ModCallCount :: integer(), | ||
[{mfa(), integer()}]})}) | ||
-> integer(). | ||
%% @doc Extract call count for a specific MFA from CProf results. | ||
call_count({Mod, _, _}=MFA, {_, ResultsPerMod}) -> | ||
{_, _, ModResults} = lists:keyfind(Mod, 1, ResultsPerMod), | ||
proplists:get_value(MFA, ModResults, 0). | ||
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%% When looking for optimization opportunities in Triq, one can try to tighten | ||
%% assertions in the tests below. | ||
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constant_singleton_vector_test() -> | ||
?LET_PROF( | ||
Prof, | ||
triq:counterexample( | ||
?FORALL( | ||
_, | ||
vector(1, return(foo)), | ||
false)), | ||
?assertMatch( | ||
C when C =< 25000, call_count( | ||
{triq_dom, shrink_list_members, 4}, Prof))). |