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function test68(n)
%TEST68 performance tests for eWiseMult
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
fprintf ('\ntest68 --------------------------- quick test of GrB_eWiseMult\n') ;
[save save_chunk] = nthreads_get ;
chunk = 4096 ;
nthreads = feature_numcores ;
nthreads_set (nthreads, chunk) ;
rng ('default') ;
if (nargin < 1)
n = 3000 ;
end
A = sparse (rand (n)) ;
B = sparse (rand (n)) ;
C = sparse (n,n) ;
for trial = 1:2
% C = A.*B, no mask
Afull = full (A) ;
Bfull = full (B) ;
tic
C0 = Afull .* Bfull ;
tf = toc ;
fprintf ('built-in, full: %0.4f\n', tf) ;
tic
C0 = A .* B ;
t0 = toc ;
tic
C1 = GB_mex_Matrix_eWiseMult (C, [ ], [ ], 'times', A, B, [ ]);
t1 = toc ;
fprintf ('built-in %0.4f GB %0.4f speedup %g\n', t0, t1, t0/t1) ;
assert (isequal (C0, C1.matrix)) ;
end
A = sprand (n, n, 0.001) ;
% C = A.*B, no mask
tic
C0 = A .* B ;
t0 = toc ;
tic
C1 = GB_mex_Matrix_eWiseMult (C, [ ], [ ], 'times', A, B, [ ]);
t1 = toc ;
fprintf ('built-in %0.4f GB %0.4f speedup %g\n', t0, t1, t0/t1) ;
assert (isequal (C0, C1.matrix)) ;
A = sparse (n, n) ;
A (n,:) = 1 ;
% C = A.*B, no mask
tic
C0 = A .* B ;
t0 = toc ;
tic
C1 = GB_mex_Matrix_eWiseMult (C, [ ], [ ], 'times', A, B, [ ]);
t1 = toc ;
fprintf ('built-in %0.4f GB %0.4f speedup %g\n', t0, t1, t0/t1) ;
assert (isequal (C0, C1.matrix)) ;
A = sparse (n, n) ;
A (1,:) = 1 ;
% C = A.*B, no mask
tic
C0 = A .* B ;
t0 = toc ;
tic
C1 = GB_mex_Matrix_eWiseMult (C, [ ], [ ], 'times', A, B, [ ]);
t1 = toc ;
fprintf ('built-in %0.4f GB %0.4f speedup %g\n', t0, t1, t0/t1) ;
assert (isequal (C0, C1.matrix)) ;
for d = [0.000:0.002:0.1]
A = sprand (n, n, d) ;
% C = A.*B, no mask
tic
C0 = A .* B ;
t0 = toc ;
tic
C1 = GB_mex_Matrix_eWiseMult (C, [ ], [ ], 'times', A, B, [ ]);
t1 = toc ;
fprintf ('d %8.3f built-in %0.4f GB %0.4f speedup %g\n', d, t0, t1, t0/t1) ;
assert (isequal (C0, C1.matrix)) ;
end
nthreads_set (save, save_chunk) ;
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