Go Lang
Robert Griesemer, Rob Pike, and Ken Thompson.
Why they built a new language ?
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Efficient Compilation
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Efficient Executions
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Ease of Programming
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Support Multicore
And who got attracted ?
Built-in Libraries
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web server
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http, url
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json, xml
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database/sql
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time
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testing
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log
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templates
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os
Easy to deploy
After compiling you get a single binary which can be directly run without any dependencies in the machine
Code
Language Features
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structs
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interface
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pointers
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errors
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OOPS ?
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garbage collection
Tools
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go fmt
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go vet
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go test
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go imports
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go bindata
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go envdata
Benchmarks
Go vs Java (Single Core)
Go vs Java (Quad Core)
Go vs C# (Single Core)
Go vs C# (Quad Core)
Concurrency vs Parallelism
Parallelism
Doing things at the same time
Concurrency
Dealing many things at the same time
Concurrency by Example
goroutines are super fast
It leverages the cost of context switching
Context switch in OS Threads
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Save / restore all registers
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16 general purpose registers
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PC (Program Counter)
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SP (Stack Pointer)
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Segment registers
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16 XMM registers
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FP coprocessor state
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All MSRs etc.
Context switch in goroutines
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Save / restore Program Counter, PC
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SP, Stack Pointer
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DX (Destination Registers)
Channels
goroutines communicates
via
channels
Do not communicate by sharing memory; instead, share memory by communicating.
Code
Go runtime schedules goroutines
Useful Links
Questions ?
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Dinner?