From 0035d40e418cad3c87b7d2cb4dc5abd95d76e8df Mon Sep 17 00:00:00 2001
From: Erica Fischer <enf@felt.com>
Date: Wed, 24 Jan 2024 10:54:21 -0800
Subject: [PATCH] Optimize the always-true filter case

---
 evaluator.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/evaluator.cpp b/evaluator.cpp
index 040f43f5..21507f36 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -667,6 +667,10 @@ json_object *parse_filter(const char *s) {
 
 bool evaluate(mvt_feature const &feat, mvt_layer const &layer, json_object *filter, std::set<std::string> &exclude_attributes, int z) {
 	if (filter != NULL) {
+		if (filter->type == JSON_TRUE) {
+			return true;
+		}
+
 		std::map<std::string, mvt_value> attributes;
 
 		for (size_t t = 0; t + 1 < feat.tags.size(); t += 2) {