Pooling is magic, Максим Клыга

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PRACTICAL RESOURCE MANAGEMENT FOR MOBILE DEVICES

POOLING IS MAGIC

W H AT D O W E K N O W A B O U T M O B I L E

W H AT D O W E K N O W A B O U T M O B I L E
• Battery is limited

W H AT D O W E K N O W A B O U T M O B I L E
• Battery is limited
• Processing power is limited

W H AT D O W E K N O W A B O U T M O B I L E
• Battery is limited
• Processing power is limited
• Storage is limited

W H AT D O W E K N O W A B O U T M O B I L E
• Battery is limited
• Processing power is limited
• Storage is limited
• RAM...

W H AT D O W E K N O W A B O U T M O B I L E
• Battery is limited
• Processing power is limited
• Storage is limited
• RAM...

W H AT D O W E K N O W A B O U T G A M E S

W H AT D O W E K N O W A B O U T G A M E S
• Consume all of the CPU

W H AT D O W E K N O W A B O U T G A M E S
• Consume all of the CPU
• Consume all of the GPU

W H AT D O W E K N O W A B O U T G A M E S
• Consume all of the CPU
• Consume all of the GPU
• Can consume a lot of storag...

W H AT D O W E K N O W A B O U T G A M E S
• Consume all of the CPU
• Consume all of the GPU
• Can consume a lot of storag...

W H AT D O W E K N O W A B O U T G A M E S
• Consume all of the CPU
• Consume all of the GPU
• Can consume a lot of storag...

R E D U C E B AT T E R Y C O N S U M P T I O N
• Reduce your network activity
• Every time cell radio is activated for 20-...

R E D U C E A P P L I C AT I O N S I Z E
• Different assets for different device categories
• Use a smaller runtime if ava...

GAMES ARE DIFFERENT

GAMES ARE DIFFERENT

• A lot is known in advance:
• Usage patterns are known
• Data dependencies are known
• Asset restric...

USE YOUR KNOWLEDGE

USE YOUR KNOWLEDGE

• Set restrictions for designers and artists
• Custom build process:
• Use available tools
• Write you...

M E M O R Y A L L O C AT I O N PAT T E R S
• Application scope (allocated at app start, freed on

shutdown)

• Level scope...

M E M O R Y A L L O C AT I O N PAT T E R N S

• Grab all required memory once on app start - this is all

you will have

•...

G O T TA G O F A S T

• Linear allocator:
• Just increase the pointer and adjust for alignment
• As fast as it can get
• F...

L I N E A R A L L O C AT O R
• Can only free in reverse order (better free all at once at scope

exit)

• How do we deal w...

B U T W A I T, W H AT A B O U T

• Objects with undefined lifetime:
• Use object pools
• Objects with variable size:
• Cus...

OBJECT POOLS
• Preallocate certain number of objects of same type
• Use objects from pool whenever one needs an object of ...

OBJECT POOLS
• Particle systems
• Components
• Game entities
• Sounds
• etc.

RESOURCE LIFETIME
• Use registers for resources of same type (fonts,

textures, etc.)

• Use reference counters only as la...

RESOURCE LIFETIME

• Don’t leave some resource hanging if it will be reused

in some other level

• Usually its ok to unlo...

REDUCE MEMORY USAGE

• ‘Prototype’ pattern:
• Extract some part to be shared by all objects
• Usually used as a template f...

‘ P R O T O T Y P E ’ PAT T E R N

• Animations
• Game entities (Similar to prefabs in Unity)
• Anything that could share ...

REDUCE MEMORY USAGE
• Unity:
• Use value types (structs, primitive types)
• Avoid boxing/unboxing
• Don’t use default GUI
...

• Always base your decisions on data

• USE PROFILER
• Don’t use this rules as a dogma, think for yourself

S TA R T P R E A L L O C AT I N G
AND
STOP WORRYING

QUESTIONS?

M A X K LY G A
E M A I L : M A X . K LY G A @ G M A I L . C O M
TWITTER: @NEKU42

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