Update

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

@@ -797,6 +797,19 @@ func (e *fastEncoder) Reset(d *dict, singleBlock bool) {
 	}
 }
 
+func (e *fastEncoder) ResetPrefix(prefix []byte) {
+	e.resetBasePrefix(prefix)
+	if len(prefix) < 8 {
+		return
+	}
+	end := e.cur + int32(len(prefix)) - 8
+	// Index every 4th
+	for i := e.cur + 1; i < end; i += 4 {
+		cv := load6432(prefix, i-e.cur)
+		e.table[hashLen(cv, tableBits, tableFastHashLen)] = tableEntry{val: uint32(cv), offset: i}
+	}
+}
+
 // ResetDict will reset and set a dictionary if not nil
 func (e *fastEncoderDict) Reset(d *dict, singleBlock bool) {
 	e.resetBase(d, singleBlock)
@@ -805,9 +818,11 @@ func (e *fastEncoderDict) Reset(d *dict, singleBlock bool) {
 	}
 
 	// Init or copy dict table
-	if len(e.dictTable) != len(e.table) || d.id != e.lastDictID {
+	if len(e.dictTable) != len(e.table) || d != e.lastDict {
 		if len(e.dictTable) != len(e.table) {
 			e.dictTable = make([]tableEntry, len(e.table))
+		} else {
+			clear(e.dictTable)
 		}
 		if true {
 			end := e.maxMatchOff + int32(len(d.content)) - 8
@@ -827,7 +842,7 @@ func (e *fastEncoderDict) Reset(d *dict, singleBlock bool) {
 				}
 			}
 		}
-		e.lastDictID = d.id
+		e.lastDict = d
 		e.allDirty = true
 	}
 
@@ -864,6 +879,10 @@ func (e *fastEncoderDict) Reset(d *dict, singleBlock bool) {
 	e.allDirty = false
 }
 
+func (e *fastEncoderDict) ResetPrefix([]byte) {
+	panic("ResetPrefix not supported for dict encoders")
+}
+
 func (e *fastEncoderDict) markAllShardsDirty() {
 	e.allDirty = true
 }