chore: update benchmark

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: missing_dependencies
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: ShabiShett07

lib/node_modules/@stdlib/blas/base/sgemv/benchmark/c/benchmark.length.c

@@ -104,10 +104,8 @@ static double benchmark1( int iterations, int len ) {
 	double t;
 	int i;
 
-	for ( i = 0; i < len; i++ ) {
-		x[ i ] = ( rand_float()*1.0f ) - 0.5f;
-		y[ i ] = ( rand_float()*1.0f ) - 0.5f;
-	}
+	stdlib_strided_sfill( len, 1.0f, x, 1 );
+	stdlib_strided_sfill( len, 1.0f, y, 1 );
 	stdlib_strided_sfill( len*len, 1.0f, A, 1 );
 	t = tic();
 	for ( i = 0; i < iterations; i++ ) {
@@ -139,10 +137,8 @@ static double benchmark2( int iterations, int len ) {
 	double t;
 	int i;
 
-	for ( i = 0; i < len; i++ ) {
-		x[ i ] = ( rand_float()*1.0f ) - 0.5f;
-		y[ i ] = ( rand_float()*1.0f ) - 0.5f;
-	}
+	stdlib_strided_sfill( len, 1.0f, x, 1 );
+	stdlib_strided_sfill( len, 1.0f, y, 1 );
 	stdlib_strided_sfill( len*len, 1.0f, A, 1 );
 	t = tic();
 	for ( i = 0; i < iterations; i++ ) {