From 81d41a442d8b75821400b949691c8ec1efa1a25f Mon Sep 17 00:00:00 2001
From: Guillaume Chau <alphadelta.fg@gmail.com>
Date: Fri, 5 Apr 2019 17:35:43 +0200
Subject: [PATCH] perf(vuex): cache last replay result

---
 src/backend/vuex.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/backend/vuex.js b/src/backend/vuex.js
index 178b0d7..3722f6f 100644
--- a/src/backend/vuex.js
+++ b/src/backend/vuex.js
@@ -460,13 +460,15 @@ class VuexBackend {
         }
 
         // Optimization: periodically cache snapshots
-        if (i !== index && i % SharedData.cacheVuexSnapshotsEvery === 0) {
+        if (i === index || (i % SharedData.cacheVuexSnapshotsEvery === 0)) {
           this.cacheStateSnapshot(i)
         }
       }
 
       // Send final state after replay
       resultState = clone(this.store.state)
+
+      if (!isProd) console.log(`replayed ${index - stateSnapshot.index} mutation(s)`)
     }
 
     this.lastState = resultState
@@ -501,10 +503,14 @@ class VuexBackend {
       state: clone(this.store.state),
       permanent
     })
+    if (!isProd) console.log('cached snapshot', index)
     // Delete old cached snapshots
     if (this.stateSnapshotCache.filter(s => !s.permanent).length > SharedData.cacheVuexSnapshotsLimit) {
       const i = this.stateSnapshotCache.findIndex(s => !s.permanent)
-      if (i !== -1) this.stateSnapshotCache.splice(i, 1)
+      if (i !== -1) {
+        if (!isProd) console.log('clean cached snapshot', this.stateSnapshotCache[i].index)
+        this.stateSnapshotCache.splice(i, 1)
+      }
     }
   }
 
-- 
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