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SDK 1.7 Preview
SDK 1.7 Preview
  • Welcome
  • Overview
    • Features
    • Roadmap
  • Getting started
    • Get the Unity SDK
    • Setup a project
      • 1. Scene setup
      • 2. Prefab setup
      • 3. Test your game locally
        • Local testing using builds
        • Local testing via Unity's Multiplayer Play Mode
        • Local testing via ParrelSync
      • 4. Test in the cloud
        • Deploy a Replication Server
        • Share builds
    • How to... ?
    • Single-player to multiplayer
    • Video tutorials
    • Samples and tutorials
      • Package samples
      • Sample Connection UIs
      • First Steps tutorial
        • 1. Basic syncing
          • 1.1 Animation parameters
          • 1.2 Sending commands
        • 2. Physics / Authority transfer
        • 3. Areas of interest
        • 4. Parenting entities
        • 5. Complex hierarchies
        • 6. Persistence
      • Campfire project
        • Game mechanics
        • Leveraging object pooling
        • Remote interactions: Chairs
        • Remote interactions: Trees
        • A unique object with complex state
        • Custom instantiation and destruction
        • Running a server-side NPC
        • Playing audio and particles
        • A simple text chat
      • Beginner's guide to networking
    • Troubleshooting
  • Manual
    • Unity Components
      • CoherenceSync
      • CoherenceBridge
      • CoherenceLiveQuery
      • CoherenceTagQuery
      • CoherenceGlobalQuery
      • CoherenceInput
      • CoherenceNode
      • PrefabSyncGroup
      • Order of execution
    • Networking state changes
      • Instantiate and Destroy Objects
      • Supported types
      • Messaging with Commands
      • Syncing child GameObjects
      • Animation
      • CoherenceSync references
      • [Sync] and [Command] Attributes
      • [OnValueSynced] Attribute
      • Creating your own syncable member
      • Custom Component Actions
      • Rigid Bodies
      • Interpolation
    • Authority
      • Authority transfer
      • Server-authoritative setup
    • Lifetime
      • Persistence
      • Uniqueness
      • Example: A global counter
    • Parenting network entities
      • Direct children CoherenceSyncs
      • Deeply-nested CoherenceSyncs
      • Nesting Prefabs at Edit time
    • Asset management
      • Instantiating from CoherenceSyncConfig
      • Instantiate via
      • Load via
    • Scene management
    • Multiple Connections within a Game Instance
    • Baking (code generation)
      • Conditional compilation
    • Replication Server
      • Rooms and Worlds
      • Replication Server API
    • Simulators (Servers)
      • Scripting: Client vs Simulator
      • Run local Simulators
      • World Simulators
      • Room Simulators
      • Advanced Simulator Authority
      • Simulator slugs
      • Build and Deploy
      • Command-line arguments
    • Client Connections
    • Optimization
      • Areas of Interest
      • Level of Detail (LOD)
      • Profiling
      • Simulation Frequency
    • Project Settings
    • Advanced topics
      • Big worlds
        • World Origin Shifting
        • Load balancing
      • Competitive games
        • Simulation Frame
        • Determinism, Prediction and Rollback
      • Team workflows
        • Version Control integration
        • Continuous Integration
      • Schema explained
        • Specification
        • Field settings
        • Archetypes
      • Code stripping
      • Replication Server CLI
      • Single-player gameplay
    • Scripting API
  • Hosting
    • Choosing where to host
    • coherence Cloud
      • Online Dashboard
      • Manage Worlds
      • Configure Rooms
      • Player Accounts
      • Game Services
        • Lobbies
        • Cloud Storage
        • Key-Value Store (Legacy)
      • APIs
        • Worlds
        • Rooms
        • Lobbies
        • Cloud Storage
        • Key-Value Store (Legacy)
    • Peer-to-peer
      • Implementing Client hosting
        • Steam Relay
        • Epic Online Services (EOS) Relay
        • Azure PlayFab Relay
  • Support
    • Release notes
    • Glossary
    • Unreal Engine support
    • WebGL support
    • ECS / DOTS support
    • Known issues
    • Upgrade guide
      • Upgrade 1.6 -> 1.7
      • Upgrade 1.5 -> 1.6
      • Upgrade 1.4 -> 1.5
      • Upgrade 1.3 -> 1.4
      • Upgrade 1.2 -> 1.3
      • Upgrade 1.1 -> 1.2
      • Upgrade 1.0 -> 1.1
      • Upgrade 0.10 -> 1.0
      • Upgrade 0.9 -> 0.10
    • Credit cost & pricing
    • Report a bug
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  • Bandwidth is limited
  • Optimization techniques

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  1. Manual

Optimization

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Bandwidth is limited

No matter how fast the internet becomes, conserving bandwidth will always be important. Some Game Clients might be on poor quality mobile networks with low upload and download speeds, or have high ping to the Replication Server and/or other Clients, etc.

Additionally, sending more data than is required consumes more memory and unnecessarily burdens the CPU and potentially GPU, which could add to performance issues, and even to quicker battery drainage.

Optimization techniques

In order to optimize the data we are sending over the network, we can employ various techniques built into the core of coherence.

  • Delta-compression (automatic). When possible, only send differences in data, not the entire state every frame.

  • Compression and quantization (automatic and configurable). Various data types can be compressed to consume less bandwidth that they naturally would.

  • Simulation frequency (configurable). Most Entities do not need to be simulated at 60+ frames per second.

  • Levels of detail (configurable). Entities need to consume less and less bandwidth the farther away they move from the observer.

  • Area of interest. Only replicate what we can see.