compat: Enable the cache benchmark

This should have been done back in 8aa12d3 (struct.go: Cache
structIndexes, 2023-01-26)

2 files changed, 13 insertions, 7 deletions

diff --git a/compat/json/borrowed_bench_test.go b/compat/json/borrowed_bench_test.go
index e2d74ab..443a13d 100644
--- a/compat/json/borrowed_bench_test.go
+++ b/compat/json/borrowed_bench_test.go
@@ -15,9 +15,13 @@ package json
 import (
 	"bytes"
 	"compress/gzip"
+	"fmt"
 	"io"
 	"os"
+	"reflect"
+	"runtime"
 	"strings"
+	"sync"
 	"testing"
 )
 
@@ -325,11 +329,10 @@ func BenchmarkUnmapped(b *testing.B) {
 	})
 }
 
-/* // MODIFIED: we don't have a cache
 func BenchmarkTypeFieldsCache(b *testing.B) {
 	b.ReportAllocs()
 	var maxTypes int = 1e6
-	if testenv.Builder() != "" {
+	if false { //  testenv.Builder() != "" { // MODIFIED: disabled
 		maxTypes = 1e3 // restrict cache sizes on builders
 	}
 
@@ -345,9 +348,9 @@ func BenchmarkTypeFieldsCache(b *testing.B) {
 	}
 
 	// clearClear clears the cache. Other JSON operations, must not be running.
-	clearCache := func() {
-		fieldCache = sync.Map{}
-	}
+	// clearCache := func() { // MODIFIED: use function from compat_test.go
+	//	fieldCache = sync.Map{} // MODIFIED: use function from compat_test.go
+	// } // MODIFIED: use function from compat_test.go
 
 	// MissTypes tests the performance of repeated cache misses.
 	// This measures the time to rebuild a cache of size nt.
@@ -389,7 +392,6 @@ func BenchmarkTypeFieldsCache(b *testing.B) {
 		})
 	}
 }
-*/ // MODIFIED: we don't have a cache
 
 func BenchmarkEncodeMarshaler(b *testing.B) {
 	b.ReportAllocs()
diff --git a/compat/json/compat_test.go b/compat/json/compat_test.go
index 2969107..203594f 100644
--- a/compat/json/compat_test.go
+++ b/compat/json/compat_test.go
@@ -14,7 +14,11 @@ import (
 	"git.lukeshu.com/go/lowmemjson/internal/jsontest"
 )
 
-var parseTag = jsonstruct.ParseTag
+var (
+	parseTag         = jsonstruct.ParseTag
+	clearCache       = jsonstruct.ClearCache
+	cachedTypeFields = jsonstruct.IndexStruct
+)
 
 type scanner = lowmemjson.ReEncoderConfig