What_s_up_Wasm_in_Go_.pdf

Transcript

1. 1
   What’s up Wasm in Go?
   GoでWebAssembly(Wasm)って今どんな感じなんでしたっけ?
   Taku Fukushima
   mercari.go #21
   Feb 28, 2023
   

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2. 2
   Abstract of Wasm binary written in Rust
   Agenda
   Demo
   What’s up Wasm in Go?
   Summary
   02
   03
   04
   01
   

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3. 3
   Abstract of Wasm binary
   written in Rust
   Chapter 1
   

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4. 4
   Goal: USPS address lookup service
   ● Required in customers’ address management
   ● ZIP Code validation and address completion in forms
   ● Current status: gRPC API in a microservice
   ● Address information is a static data
   ○ 41,704 lines of CSV: 1.6 MiB
   ○ Monthly updated
   ○ We retrieve uniquely formatted data from USPS, parse it and
   generate a CSV file with K8s CronJob
   ● No JS/browser dependency
   ZIP Code → Address Information
   

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5. 5
   画像

   Original data has all US address information in a line
   Our CSV data
   

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6. 6
   Make it Wasm binary
   ● CSV → binary data via Rust’s Build Scripts
   ○ We don’t want to load CSV at runtime
   ○ We want address data in binary
   ● Embed the binary into code via include_bytes!
   ● Compacted address info stored in Trie
   ○ std::collections::HashMap → rust-phf → fs_trie
   ● Export Wasm binary and JS compatibility layer via wasm-pack
   ZIP Code in string → Address Information in JSON
   

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7. 7
   Demo
   Chapter 2
   

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8. 8
   What’s up Wasm in Go?
   Chapter 3
   

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9. 9
   My past experience
   ● Go compiler has WASM target by default
   ○ GOOS=js GOARCH=wasm
   ○ With JavaScript glue
   ■ $(go env GOROOT)/misc/wasm/wasm_exec.js
   ○ Relatively bigger size Wasm binary
   ● TinyGo can generate binary with smaller footprint
   ○ tinygo build -o module.wasm -target wasi .
   Wasm binary generated from Go code contains Go runtime
   

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10. 10
    My current experience
    ● Still TinyGo is a good option
    ● go:embed can be used embedding binary data in Wasm binary
    ● Nice trie/radix tree library is needed with gob/binary format
    compatibility
    ○ github.com/hashicorp/go-immutable-radix did not get
    along with gob
    ○ * I just could not find one and there could be any out there
    Not changed so much since last time
    

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11. 11
    Future?
    ● GC
    ● Threads
    ● Does Go dream of lightweight Wasm binary output?
    New Wasm standards are added
    

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12. 12
    Summary
    Chapter 4
    

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13. 13
    Go in Wasm
    ● Default Go compiler supports
    ● Still TinyGo is a good option
    ● We could see some improvements in the future?
    ● Various matured Wasm runtime
    ○ github.com/wasmerio/wasmer-go
    ○ github.com/tetratelabs/wazero
    ○ …
    Go has nice Wasm supports
    

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14. 14
    End of Slides
    EOS
    

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