feat(wpcarro/slx): Include naive optimizations r/5712

Empty queries and empty lists.

Change-Id: Iacd429feb9d6a0b48ffcac682c3dbd4a0a164134
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7880
Tested-by: BuildkiteCI
Autosubmit: wpcarro <wpcarro@gmail.com>
Reviewed-by: wpcarro <wpcarro@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/users/wpcarro/slx.js/index.js b/users/wpcarro/slx.js/index.js
index 0f980c8d5a97..8f6eff3c43bd 100644
--- a/users/wpcarro/slx.js/index.js
+++ b/users/wpcarro/slx.js/index.js
@@ -1,4 +1,9 @@
 function select(query, xs, config) {
+    // naive optimizations
+    if (query === '' || xs === []) {
+        return xs;
+    }
+
     const predicate = compile(parse(query, config), config);
     return xs.filter(predicate);
 }