diff --git a/src/parser3.h b/src/parser3.h
index 916ce06..3553960 100644
--- a/src/parser3.h
+++ b/src/parser3.h
@@ -327,14 +327,27 @@ inline Status n_string(Parser3 *self) {
 }
 
 inline Status n_string2(Parser3 *self) {
+  auto commit = [self, before = self->buf]() {
+    int len = self->buf - before;
+    if (self->writeBuf != before) {
+      memmove(self->writeBuf, before, len);
+    }
+    self->writeBuf += len;
+  };
 begin:
-  switch (tables.stringByteMeaning[uint8_t(*self->buf)]) {
-  case Tables::NORMAL:
-    *self->writeBuf++ = *self->buf++;
+  auto meaning = tables.stringByteMeaning[uint8_t(*self->buf)];
+  if (meaning == Tables::NORMAL) {
+    ++self->buf;
     if (self->buf == self->bufEnd) {
+      commit();
       MUSTTAIL return Parser3::keepGoing(self);
     }
     goto begin;
+  }
+  commit();
+  switch (meaning) {
+  case Tables::NORMAL:
+    __builtin_unreachable();
   case Tables::DUBQUOTE:
     self->flushString();
     self->callbacks->on_end_string(self->data);