# Issue v3.3 =\> V4 **URL:** \ **Category:** Questions\ **Created:** [March 31, 2019, 3:40pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254 "2019-03-31T15:40:35Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 3:40pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/1 "2019-03-31T15:40:36Z")
I developping a game, the scene of the game have lot mesh more than 1000. The scene works very good with V3 (60 fps), but with V4 since the 26-28 march the scene render at 1fps before this date the scene worked good with v4 too, (60fps). I don’t understand why. Maybe the dev of babylonjs (Thank you for this amazing engine) add a function or feature which break that? Maybe the code of V3 its not totally compatible and i need to change something? Maybe im doing wrong something? All the meshes are Instanced mesh so maybe its not the same thing in V4 since the 26-28 march ? If i set isVisiblle false to all the InstancedMesh scene is in 60 fps. If anybody have an idea? Thank you )) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 3:45pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/2 "2019-03-31T15:45:42Z")
Can you share your scene somewhere? Would love to do a profiling:) Or if you can repro in the playground? ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 3:50pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/3 "2019-03-31T15:50:50Z")
Thank you for you quick response Deltakosh. You can test it here In launch game: Force 2 in select box and just click on start [https://blockmaze01.000webhostapp.com/](https://blockmaze01.000webhostapp.com/) I changed the version to V4 “B” to desactivate the instanced mesh “N” to show the debugger Thank you )) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 3:51pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/4 "2019-03-31T15:51:40Z")
Do you mind referencing Babylon.max.js? Pinging @sebavan as well ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 3:53pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/5 "2019-03-31T15:53:41Z")
I put this references : ` ` ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 3:54pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/6 "2019-03-31T15:54:25Z")
![image](https://us1.discourse-cdn.com/flex024/uploads/babylonjs/original/2X/d/de13df3e429b8aecea67b88a4b5f4554b05ce8db.png) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 3:56pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/7 "2019-03-31T15:56:42Z")
yep please use babylon.max.js instead It runs a 60fps here btw can you also share the version with 3.3 ? ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:00pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/8 "2019-03-31T16:00:07Z")
Do you want a link with my project in V3 or a link of the V3 version that use? ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 4:01pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/9 "2019-03-31T16:01:15Z")
I would like the same demo but using v3.3 (or the ref where it was running fine :)) I need to compare because I do not repro your issue (seeing it a 60fps here and pretty solid) ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:02pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/10 "2019-03-31T16:02:51Z")
Yes sure (Thank you for help) Let me a few minutes and i create another version on the version I will quickly add 2 button one for V3 the other for V4 )) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 4:03pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/11 "2019-03-31T16:03:12Z")
wonderful! ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:09pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/12 "2019-03-31T16:09:19Z")
Thanks to you )) Now you can launch in the two versions : ![image](https://us1.discourse-cdn.com/flex024/uploads/babylonjs/original/2X/6/62b3e9efbc7cb8f2496f75bd03dc0f6c6d90f8c1.png) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 4:14pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/13 "2019-03-31T16:14:09Z")
Can I ask you to add a 3rd one with this ref: > thanks a lot ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:21pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/14 "2019-03-31T16:21:33Z")
Thanks to you, I’m doing it. ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:26pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/15 "2019-03-31T16:26:23Z")
Done. ![image](https://us1.discourse-cdn.com/flex024/uploads/babylonjs/original/2X/0/0fa04a03ff0b96712e70de5a0946d2943acd8f44.png) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 4:26pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/16 "2019-03-31T16:26:32Z")
you rock! ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:29pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/17 "2019-03-31T16:29:04Z")
thank you, you too )) ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 4:30pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/18 "2019-03-31T16:30:37Z")
Ok so 20days ago it was still good ---
**Author:** ![Block\_Maze](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/block_maze/32/1410_2.png) [@Block\_Maze](https://forum.babylonjs.com/u/Block_Maze)\ **Post date:** [March 31, 2019, 4:31pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/19 "2019-03-31T16:31:45Z")
Less than 20 days, it was good near the 20th march ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [March 31, 2019, 4:32pm UTC](https://forum.babylonjs.com/t/issue-v3-3-v4/2254/20 "2019-03-31T16:32:03Z")
Please tell me if this is too much but I try to pinpoint where is the culprit 😉 can you add this one\>? [https://raw.githubusercontent.com/BabylonJS/Babylon.js/e4e88c059b1baea4bfa34063ffff2fe19503eeae/dist/preview%20release/babylon.max.js](https://raw.githubusercontent.com/BabylonJS/Babylon.js/e4e88c059b1baea4bfa34063ffff2fe19503eeae/dist/preview%20release/babylon.max.js) [Next page](https://forum.babylonjs.com/t/issue-v3-3-v4/2254.md?page=2)