src: cache the result of GetOptions() in JS land

Instead of calling into C++ each time we need to check the value
of a command line option, cache the option map in a new
`internal/options` module for faster access to the values in JS land.

PR-URL: https://github.com/nodejs/node/pull/24091
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Refael Ackermann <refack@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/internal/options.js b/lib/internal/options.js
new file mode 100644
index 0000000000..e494787b96
--- /dev/null
+++ b/lib/internal/options.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const { getOptions } = internalBinding('options');
+const { options, aliases } = getOptions();
+
+function getOptionValue(option) {
+  const result = options.get(option);
+  if (!result) {
+    return undefined;
+  }
+  return result.value;
+}
+
+module.exports = {
+  options,
+  aliases,
+  getOptionValue
+};