4、 High performance go language release optimization and landing practice youth training camp notes

High performance Go Language distribution optimization and implementation practice | Youth Camp notes

This is my participation 「 The third youth training camp - Back end field 」 The third part of note creation activities 4 Notes

Memory aspect

One 、 Automatic memory management

Concept ：

• Mutator： Business thread , Assign new objects , Modify the object pointing relationship （ Created goroutine）

• Collector：GC Threads , Find the living object , Reclaim memory space of dead objects

• Serial GC： only one collector

• Parallel GC： Support multiple collectors Recycled at the same time GC Algorithm

• Concurrent GC：mutator(s) and collector(s) It can be executed at the same time

  

  

GC：

• GC Algorithm ： Security 、 Throughput rate 、 Pause time 、 Memory overhead

• Track garbage collection ：

  • Tag root object
  • Mark reachable objects
  • Clean up unreachable objects
  • Use different marking and cleaning strategies according to the life cycle of the object

• generational GC：

  • Age ： experienced GC The number of times

  • Purpose ： For young or old people of different ages , Develop different strategies GC Strategy , Reduce overall memory management overhead

    

• Reference count ：

  • Each object has the number of references associated with it , Greater than 0 It's survival
  • The disadvantage is that ring data structures cannot be recycled 、 Maintaining reference counts is expensive

Two 、Go Memory management and optimization

Memory allocation ：

• Block

• cache

• Management optimization

  go Memory allocation

  • Actual optimization plan ：Balanced GC

Compiler optimization

One 、 Compiler and static analysis

Compiler structure ：

Static analysis ：

In process analysis 、 Interprocess analysis ：

Two 、Go Compiler optimization

Function inlining ：

Escape analysis ：

Static analysis ：

In process analysis 、 Interprocess analysis ：

Two 、Go Compiler optimization

Function inlining ：

Escape analysis ：

Beast mode