Add heap-profiling script

test/profile/heap.cc

@@ -0,0 +1,42 @@
+#include <fstream>
+#include <string>
+#include <cstdlib>
+#include <tree_sitter/api.h>
+
+extern "C" {
+#include "javascript/src/parser.c"
+#include "javascript/src/scanner.c"
+}
+
+#define LANGUAGE tree_sitter_javascript
+#define SOURCE_PATH "javascript/examples/jquery.js"
+
+int main() {
+  TSParser *parser = ts_parser_new();
+  if (!ts_parser_set_language(parser, LANGUAGE())) {
+    fprintf(stderr, "Invalid language\n");
+    exit(1);
+  }
+
+  const char *source_path = GRAMMARS_DIR SOURCE_PATH;
+
+  printf("Parsing %s\n", source_path);
+
+  std::ifstream source_file(source_path);
+  if (!source_file.good()) {
+    fprintf(stderr, "Invalid source path %s\n", source_path);
+    exit(1);
+  }
+
+  std::string source_code(
+    (std::istreambuf_iterator<char>(source_file)),
+    std::istreambuf_iterator<char>()
+  );
+
+  TSTree *tree = ts_parser_parse_string(
+    parser,
+    NULL,
+    source_code.c_str(),
+    source_code.size()
+  );
+}