From ee8e61a062cc929b218d8516abc45ca2af73c6e4 Mon Sep 17 00:00:00 2001
From: Paul Masurel <paul.masurel@gmail.com>
Date: Wed, 6 Jan 2021 19:20:17 +0900
Subject: [PATCH] Wrapping stemmer into an Arc

---
 src/tokenizer/stemmer.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/tokenizer/stemmer.rs b/src/tokenizer/stemmer.rs
index 9d84d5799..bf7f0b3fe 100644
--- a/src/tokenizer/stemmer.rs
+++ b/src/tokenizer/stemmer.rs
@@ -1,3 +1,5 @@
+use std::sync::Arc;
+
 use super::{Token, TokenFilter};
 use rust_stemmers::{self, Algorithm};
 use serde::{Deserialize, Serialize};
@@ -57,14 +59,16 @@ impl Language {
 /// Tokens are expected to be lowercased beforehand.
 #[derive(Clone)]
 pub struct Stemmer {
-    stemmer: rust_stemmers::Stemmer,
+    stemmer: Arc<rust_stemmers::Stemmer>,
 }
 
 impl Stemmer {
     /// Creates a new Stemmer `TokenFilter` for a given language algorithm.
     pub fn new(language: Language) -> Stemmer {
         let stemmer = rust_stemmers::Stemmer::create(language.algorithm());
-        Stemmer { stemmer }
+        Stemmer {
+            stemmer: Arc::new(stemmer),
+        }
     }
 }