Update

vendor/github.com/klauspost/compress/zstd/enc_dfast.go

@@ -1037,18 +1037,33 @@ func (e *doubleFastEncoder) Reset(d *dict, singleBlock bool) {
 	}
 }
 
+func (e *doubleFastEncoder) ResetPrefix(prefix []byte) {
+	e.fastEncoder.ResetPrefix(prefix)
+	if len(prefix) < 8 {
+		return
+	}
+	end := e.cur + int32(len(prefix)) - 8
+	for i := e.cur + 1; i < end; i += 2 {
+		cv := load6432(prefix, i-e.cur)
+		e.longTable[hashLen(cv, dFastLongTableBits, dFastLongLen)] = tableEntry{val: uint32(cv), offset: i}
+	}
+}
+
 // ResetDict will reset and set a dictionary if not nil
 func (e *doubleFastEncoderDict) Reset(d *dict, singleBlock bool) {
 	allDirty := e.allDirty
+	dictChanged := d != e.lastDict
 	e.fastEncoderDict.Reset(d, singleBlock)
 	if d == nil {
 		return
 	}
 
 	// Init or copy dict table
-	if len(e.dictLongTable) != len(e.longTable) || d.id != e.lastDictID {
+	if len(e.dictLongTable) != len(e.longTable) || dictChanged {
 		if len(e.dictLongTable) != len(e.longTable) {
 			e.dictLongTable = make([]tableEntry, len(e.longTable))
+		} else {
+			clear(e.dictLongTable)
 		}
 		if len(d.content) >= 8 {
 			cv := load6432(d.content, 0)
@@ -1065,7 +1080,6 @@ func (e *doubleFastEncoderDict) Reset(d *dict, singleBlock bool) {
 				}
 			}
 		}
-		e.lastDictID = d.id
 		allDirty = true
 	}
 	// Reset table to initial state
@@ -1100,6 +1114,10 @@ func (e *doubleFastEncoderDict) Reset(d *dict, singleBlock bool) {
 	}
 }
 
+func (e *doubleFastEncoderDict) ResetPrefix([]byte) {
+	panic("ResetPrefix not supported for dict encoders")
+}
+
 func (e *doubleFastEncoderDict) markLongShardDirty(entryNum uint32) {
 	e.longTableShardDirty[entryNum/dLongTableShardSize] = true
 }