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Merged
kgryte merged 3 commits into from
Jul 31, 2026
Merged

bench: refactor C benchmarks to use pre-computed values #13798

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f461105
bench: refactor C benchmarks to pre load input values
nakul-krishnakumar Jul 31, 2026
4c23419
chore: update according to code review
nakul-krishnakumar Jul 31, 2026
9ec22d4
chore: update according to code review
nakul-krishnakumar Jul 31, 2026
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22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/add/benchmark/c/benchmark.c
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Original file line number Diff line number Diff line change
Expand Up @@ -74,13 +74,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -100,14 +102,17 @@ float addf( const float x, const float y ) {
static double benchmark( void ) {
double elapsed;
double t;
float x;
float *x;
float y;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -500.0f, 500.0f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( 1000.0f*rand_float() ) - 500.0f;
y = addf( x, 5.0f );
y = addf( x[ i%100 ], 5.0f );
if ( y != y ) {
printf( "should not return NaN\n" );
break;
Expand All @@ -117,6 +122,7 @@ static double benchmark( void ) {
if ( y != y ) {
printf( "should not return NaN\n" );
}
free( x );
return elapsed;
}

Expand Down
22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/add/benchmark/c/native/benchmark.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,13 +75,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -92,14 +94,17 @@ static float rand_float( void ) {
static double benchmark( void ) {
double elapsed;
double t;
float x;
float *x;
float y;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -500.0f, 500.0f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( 1000.0f*rand_float() ) - 500.0f;
y = stdlib_base_float32_add( x, 5.0f );
y = stdlib_base_float32_add( x[ i%100 ], 5.0f );
if ( y != y ) {
printf( "should not return NaN\n" );
break;
Expand All @@ -109,6 +114,7 @@ static double benchmark( void ) {
if ( y != y ) {
printf( "should not return NaN\n" );
}
free( x );
return elapsed;
}

Expand Down
22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/div/benchmark/c/benchmark.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,13 +74,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -100,14 +102,17 @@ float divide( const float x, const float y ) {
static double benchmark( void ) {
double elapsed;
double t;
float x;
float *x;
float y;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -500.0f, 500.0f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( 1000.0f*rand_float() ) - 500.0f;
y = divide( x, 5.0f );
y = divide( x[ i%100 ], 5.0f );
if ( y != y ) {
printf( "should not return NaN\n" );
break;
Expand All @@ -117,6 +122,7 @@ static double benchmark( void ) {
if ( y != y ) {
printf( "should not return NaN\n" );
}
free( x );
return elapsed;
}

Expand Down
22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/div/benchmark/c/native/benchmark.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,13 +75,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -92,14 +94,17 @@ static float rand_float( void ) {
static double benchmark( void ) {
double elapsed;
double t;
float x;
float *x;
float y;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -500.0f, 500.0f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( 1000.0f*rand_float() ) - 500.0f;
y = stdlib_base_float32_div( x, 5.0f );
y = stdlib_base_float32_div( x[ i%100 ], 5.0f );
if ( y != y ) {
printf( "should not return NaN\n" );
break;
Expand All @@ -109,6 +114,7 @@ static double benchmark( void ) {
if ( y != y ) {
printf( "should not return NaN\n" );
}
free( x );
return elapsed;
}

Expand Down
22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/exponent/benchmark/c/benchmark.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -76,13 +76,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -94,13 +96,16 @@ static double benchmark( void ) {
double elapsed;
int32_t out;
double t;
float x;
float *x;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -5.0e6f, 5.0e6f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( rand_float()*1.0e7f ) - 5.0e6f;
out = stdlib_base_float32_exponent( x );
out = stdlib_base_float32_exponent( x[ i%100 ] );
if ( out == 128 ) {
printf( "unexpected result\n" );
break;
Expand All @@ -110,6 +115,7 @@ static double benchmark( void ) {
if ( out == 128 ) {
printf( "unexpected result\n" );
}
free( x );
return elapsed;
}

Expand Down
22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/identity/benchmark/c/native/benchmark.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,13 +75,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -92,14 +94,17 @@ static float rand_float( void ) {
static double benchmark( void ) {
double elapsed;
double t;
float x;
float *x;
float y;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -500.0f, 500.0f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( 1000.0f*rand_float() ) - 500.0f;
y = stdlib_base_float32_identity( x );
y = stdlib_base_float32_identity( x[ i%100 ] );
if ( y != y ) {
printf( "should not return NaN\n" );
break;
Expand All @@ -109,6 +114,7 @@ static double benchmark( void ) {
if ( y != y ) {
printf( "should not return NaN\n" );
}
free( x );
return elapsed;
}

Expand Down
22 changes: 14 additions & 8 deletions lib/node_modules/@stdlib/number/float32/base/mul/benchmark/c/benchmark.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,13 +74,15 @@ static double tic( void ) {
}

/**
* Generates a random number on the interval [0,1).
* Generates a random number on the interval [min,max).
*
* @return random number
* @param min minimum value (inclusive)
* @param max maximum value (exclusive)
* @return random number
*/
static float rand_float( void ) {
int r = rand();
return (float)r / ( (float)RAND_MAX + 1.0f );
static float random_uniform( const float min, const float max ) {
float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
return min + ( v*( max-min ) );
}

/**
Expand All @@ -99,15 +101,18 @@ float mulf( const float x, const float y ) {
*/
static double benchmark( void ) {
double elapsed;
float x;
float *x;
float y;
double t;
int i;

x = (float *) malloc( 100 * sizeof( float ) );
for ( i = 0; i < 100; i++ ) {
x[ i ] = random_uniform( -500.0f, 500.0f );
}
t = tic();
for ( i = 0; i < ITERATIONS; i++ ) {
x = ( 1000.0f*rand_float() ) - 500.0f;
y = mulf( x, 5.0f );
y = mulf( x[ i%100 ], 5.0f );
if ( y != y ) {
printf( "should not return NaN\n" );
break;
Expand All @@ -117,6 +122,7 @@ static double benchmark( void ) {
if ( y != y ) {
printf( "should not return NaN\n" );
}
free( x );
return elapsed;
}

Expand Down
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