From 8f7b9133f0ccf963c12aa86ff5225bc2ba6f2e0c Mon Sep 17 00:00:00 2001
From: Steve McDaniel <nibbleshift@gmail.com>
Date: Mon, 8 May 2023 11:05:17 -0600
Subject: [PATCH 1/4] Add LRU cache for JSONPointerToSlice and DotPathToSlice.

Signed-off-by: Steve McDaniel <nibbleshift@gmail.com>
---
 gabs.go | 28 ++++++++++++++++++++++++++++
 go.mod  |  4 +++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/gabs.go b/gabs.go
index b846954..5e0ce14 100644
--- a/gabs.go
+++ b/gabs.go
@@ -31,6 +31,8 @@ import (
 	"os"
 	"strconv"
 	"strings"
+
+	lru "github.com/hashicorp/golang-lru/v2"
 )
 
 //------------------------------------------------------------------------------
@@ -79,11 +81,17 @@ var (
 var (
 	r1 *strings.Replacer
 	r2 *strings.Replacer
+	// Cache for DotPathToSlice
+	dotPathCache *lru.Cache[string, []string]
+	// Cache for JSONPointerToSlice
+	jsonPointerCache *lru.Cache[string, []string]
 )
 
 func init() {
 	r1 = strings.NewReplacer("~1", "/", "~0", "~")
 	r2 = strings.NewReplacer("~1", ".", "~0", "~")
+	dotPathCache, _ = lru.New[string, []string](1024)
+	jsonPointerCache, _ = lru.New[string, []string](1024)
 }
 
 //------------------------------------------------------------------------------
@@ -105,10 +113,20 @@ func JSONPointerToSlice(path string) ([]string, error) {
 	if path == "/" {
 		return []string{""}, nil
 	}
+
+	item, ok := jsonPointerCache.Get(path)
+
+	if ok {
+		return item, nil
+	}
+
 	hierarchy := strings.Split(path, "/")[1:]
 	for i, v := range hierarchy {
 		hierarchy[i] = r1.Replace(v)
 	}
+
+	jsonPointerCache.Add(path, hierarchy)
+
 	return hierarchy, nil
 }
 
@@ -118,10 +136,20 @@ func JSONPointerToSlice(path string) ([]string, error) {
 // if it appears in the reference key. Likewise, '~' (%x7E) must be encoded
 // as '~0' since it is the escape character for encoding '.'.
 func DotPathToSlice(path string) []string {
+	item, ok := dotPathCache.Get(path)
+
+	if ok {
+		return item
+	}
+
 	hierarchy := strings.Split(path, ".")
+
 	for i, v := range hierarchy {
 		hierarchy[i] = r2.Replace(v)
 	}
+
+	dotPathCache.Add(path, hierarchy)
+
 	return hierarchy
 }
 
diff --git a/go.mod b/go.mod
index bd75790..a791483 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module github.com/Jeffail/gabs/v2
 
-go 1.16
+go 1.18
+
+require github.com/hashicorp/golang-lru/v2 v2.0.2

From 43bcb71cf1b398789f9d2a09deedeec797c9fb99 Mon Sep 17 00:00:00 2001
From: Steve McDaniel <nibbleshift@gmail.com>
Date: Mon, 8 May 2023 11:11:58 -0600
Subject: [PATCH 2/4] Add go.sum

---
 go.sum | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 go.sum

diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..8f2fb76
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/hashicorp/golang-lru/v2 v2.0.2 h1:Dwmkdr5Nc/oBiXgJS3CDHNhJtIHkuZ3DZF5twqnfBdU=
+github.com/hashicorp/golang-lru/v2 v2.0.2/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=

From 11cd7d9142f2a796e979aff7b43f7ba4381f8d8a Mon Sep 17 00:00:00 2001
From: Steve McDaniel <nibbleshift@gmail.com>
Date: Mon, 8 May 2023 11:13:59 -0600
Subject: [PATCH 3/4] bump to go 1.18.x

---
 .github/workflows/test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f1f4207..3ba89bd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.16.x
+          go-version: 1.18.x
 
       - name: Checkout code
         uses: actions/checkout@v3

From 856d3c632fe5a35989d6ed699306152e6c961f07 Mon Sep 17 00:00:00 2001
From: Steve McDaniel <nibbleshift@gmail.com>
Date: Sun, 18 Feb 2024 20:17:19 -0700
Subject: [PATCH 4/4] add benchmark for JSONPointerToSlice cache

---
 gabs_test.go | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/gabs_test.go b/gabs_test.go
index f8429e5..29506d2 100644
--- a/gabs_test.go
+++ b/gabs_test.go
@@ -1950,3 +1950,37 @@ func BenchmarkWildcardSearch(b *testing.B) {
 		val.Search([]string{"test", "*", "value"}...)
 	}
 }
+
+func BenchmarkJsonPointerToSlice(b *testing.B) {
+	samples := []string{
+		"/test/field",
+		"/field/test",
+		"/user/name",
+		"/user/email/address",
+		"/host/ip/addres",
+		"/host/os/family",
+		"/host/os/version",
+		"/test/field",
+		"/field/test",
+		"/user/name",
+		"/user/email/address",
+		"/host/ip/addres",
+		"/host/os/family",
+		"/host/os/version",
+		"/test/field",
+		"/field/test",
+		"/user/name",
+		"/user/email/address",
+		"/host/ip/addres",
+		"/host/os/family",
+		"/host/os/version",
+	}
+	b.ReportAllocs()
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		for _, s := range samples {
+			JSONPointerToSlice(s)
+		}
+	}
+}