feat: updated C benchmarks with precomputation

Author: aayush0325

lib/node_modules/@stdlib/math/base/special/lcmf/benchmark/c/native/benchmark.c

@@ -91,27 +91,30 @@ static float rand_float( void ) {
 */
 static double benchmark( void ) {
 	double elapsed;
-	float x;
-	float y;
-	float z;
+	float a[ 100 ];
+	float b[ 100 ];
 	double t;
+	float y;
 	int i;
 
+	for ( i = 0; i < 100; i++ ) {
+		a[ i ] = roundf( 500.0f * rand_float() );
+		b[ i ] = roundf( 500.0f * rand_float() );
+	}
+
 	t = tic();
 	for ( i = 0; i < ITERATIONS; i++ ) {
-		x = round( rand_float() * 500.0f );
-		y = round( rand_float() * 500.0f );
-		z = stdlib_base_lcmf( x, y );
-		if ( z != z ) {
+		y = stdlib_base_lcmf( a[ i % 100 ], b[ i % 100 ] );
+		if ( y != y ) {
 			printf( "should not return NaN\n" );
 			break;
 		}
 	}
 	elapsed = tic() - t;
-	if ( z != z ) {
+	if ( y != y ) {
 		printf( "should not return NaN\n" );
 	}
-	return elapsed;
+	return elapsed;	
 }
 
 /**