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Change DmpAlg to use preallocated arrays (#283) 

* Change DmpAlg to use preallocated arrays

DmpAlg isn't called with nr_order_ > 3 so this change saves 9 news and 9
frees for each construction and destruction of the class.

* Remove nr_order size check in DmpAlg constructor

Signed-off-by: Drew Lewis <cannada@google.com>

---------

Signed-off-by: Drew Lewis <cannada@google.com>
This commit is contained in:
Drew Lewis 2025-08-23 14:34:32 -04:00 committed by GitHub
parent b654fd48a8
commit 255988633f
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GPG Key ID: B5690EEEBB952194
1 changed files with 13 additions and 24 deletions
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37
dcalc/DmpCeff.cc
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@ -263,12 +263,16 @@ protected:
// Driver parameter Newton-Raphson state.
int nr_order_;
double *x_;
double *fvec_;
double **fjac_;
double *scale_;
double *p_;
int *index_;
static constexpr int max_nr_order_ = 3;
double x_[max_nr_order_];
double fvec_[max_nr_order_];
double fjac_storage_[max_nr_order_ * max_nr_order_];
double *fjac_[max_nr_order_];
double scale_[max_nr_order_];
double p_[max_nr_order_ ];
int index_[max_nr_order_];
// Driver slew used to check load delay.
double drvr_slew_;
@ -288,27 +292,12 @@ DmpAlg::DmpAlg(int nr_order,
c1_(0.0),
nr_order_(nr_order)
{
x_ = new double[nr_order_];
fvec_ = new double[nr_order_];
scale_ = new double[nr_order_];
p_ = new double[nr_order_];
fjac_ = new double*[nr_order_];
for (int i = 0; i < nr_order_; i++)
fjac_[i] = new double[nr_order_];
index_ = new int[nr_order_];
// Only use the upper left block of the matrix
fjac_[i] = fjac_storage_ + i * max_nr_order_;
}
DmpAlg::~DmpAlg()
{
delete [] x_;
delete [] fvec_;
delete [] scale_;
delete [] p_;
for (int i = 0; i < nr_order_; i++)
delete [] fjac_[i];
delete [] fjac_;
delete [] index_;
}
DmpAlg::~DmpAlg() = default;
void
DmpAlg::init(const LibertyLibrary *drvr_library,