From 3abc1e5e460738f302e48ea7f369c1466fd044ca Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Tue, 25 Apr 2023 10:20:15 +0100
Subject: Make state.path immutable so it can be a reference instead of copied,
 improving performance

---
 main/command.go |  2 +-
 walk/walk.go    | 11 -----------
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/main/command.go b/main/command.go
index 55c7cca..0db545b 100644
--- a/main/command.go
+++ b/main/command.go
@@ -116,5 +116,5 @@ func (cmd SwapPathCommand) exec(state *ProgramState) {
 
 type AppendPathCommand struct {}
 func (cmd AppendPathCommand) exec(state *ProgramState) {
-	state.path = append(state.path, state.value...)
+	state.path = walk.ConcatData(state.path, state.value)
 }
\ No newline at end of file
diff --git a/walk/walk.go b/walk/walk.go
index f9bac2a..493bc46 100644
--- a/walk/walk.go
+++ b/walk/walk.go
@@ -333,17 +333,6 @@ func (in *JSONIn) readString(out []Atom) []Atom {
 }
 
 func (in *JSONIn) Read() (WalkItem, error) {
-	item, err := in.read()
-	if err != nil {
-		return item, err
-	}
-	return WalkItem {
-		Value: item.Value,
-		Path: append([]Atom{}, item.Path...),
-	}, err
-}
-
-func (in *JSONIn) read() (WalkItem, error) {
 	restart:
 	// TODO: Escaping
 	// TODO: Don't allow trailing commas
-- 
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