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Haskell Runtime

Haskell runtime (officially GHC RTS — Glasgow Haskell Compiler Runtime System) wo underlying system…

Overview

Haskell Runtime — Quick Facts

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Property: Detail

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Full Name: GHC Runtime System (GHC RTS)

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Part Of: GHC (Glasgow Haskell Compiler)

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Written In: C and Cmm (C--)

Topic 1

Infobox

📚 | Property | Detail | |---|---| | Full Name | GHC Runtime System (GHC RTS) | | Part Of |…

Topic 2

Why Haskell Needs a Special Runtime

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Haskell lazy by default hai —…

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Runtime ko thunks manage karne…

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Jab thunk "forced" hota hai,…

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Ye C/Java me nahi hota — wahan sab…

Topic 3

RTS Architecture

🎯 `mermaid flowchart TD BINARY["Compiled Haskell Binary"] --> RTS["GHC Runtime System…

Topic 4

Thunks and Lazy Evaluation

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Thunk = ek pointer jo ek…

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Jab Haskell me likho let x = 1 +…

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Instead ek thunk banata hai: "jab…

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Ye Haskell ka call-by-need…

Topic 5

Garbage Collector

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Generational hypothesis — most…

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Parallel GC — multiple cores par…

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Concurrent GC — Not confirmed —…

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Low pause times — nursery (Gen 0)…

Topic 6

Green Threads and Concurrency

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M green threads mapped to N OS…

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Default: N = 1 (single OS thread)

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+RTS -N4 → 4 OS threads…

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Key RTS Flags

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Everything between +RTS and -RTS…

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Everything else is for the program

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Profiling and Observability

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Total bytes allocated

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Max residency (peak live memory)

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GC time (percentage of total)

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Productivity (time doing useful…

Topic 9

Haskell RTS vs Other Runtimes

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Performance Tuning

💡 | Scenario | Tuning Approach | |---|---| | High GC percentage (>30%) | Increase nursery:…

Comparison

Haskell RTS vs Other Runtimes

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Lazy Evaluation: Yes (thunks, STG…

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GC Type: Generational copying

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Threading: Green threads (M:N)

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Haskell Runtime ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Haskell Runtime ka 'Full Name' kya hai?

Complete! 🎉

Haskell Runtime Complete!

Aliens Wiki · HIEN · Cinematic Knowledge

✅

Haskell Runtime Complete

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Haskell Runtime

Haskell Runtime — Quick Facts

Property: Detail

Full Name: GHC Runtime System (GHC RTS)

Part Of: GHC (Glasgow Haskell Compiler)

Written In: C and Cmm (C--)

Infobox

Why Haskell Needs a Special Runtime

Haskell lazy by default hai —…

Runtime ko thunks manage karne…

Jab thunk "forced" hota hai,…

Ye C/Java me nahi hota — wahan sab…

RTS Architecture

Thunks and Lazy Evaluation

Thunk = ek pointer jo ek…

Jab Haskell me likho let x = 1 +…

Instead ek thunk banata hai: "jab…

Ye Haskell ka call-by-need…

Garbage Collector

Generational hypothesis — most…

Parallel GC — multiple cores par…

Concurrent GC — Not confirmed —…

Low pause times — nursery (Gen 0)…

Green Threads and Concurrency

M green threads mapped to N OS…

Default: N = 1 (single OS thread)

+RTS -N4 → 4 OS threads…

Key RTS Flags

Everything between +RTS and -RTS…

Everything else is for the program

Profiling and Observability

Total bytes allocated

Max residency (peak live memory)

GC time (percentage of total)

Productivity (time doing useful…

Haskell RTS vs Other Runtimes

Performance Tuning

Haskell RTS vs Other Runtimes

Lazy Evaluation: Yes (thunks, STG…

GC Type: Generational copying

Threading: Green threads (M:N)

Visual Flow

See Also

Haskell

Haskell Debugging

Garbage Collection.md)

Lazy Evaluation

Green Thread

Concurrency.md)

Quiz — Question 1

Quiz — Question 2

Haskell Runtime Complete!

Haskell Runtime Complete

Haskell