struct Crysda::NullBitmap

• Crysda::NullBitmap
• Struct
• Value
• Object

Overview

=========================================================================== Null Bitmap - 1 bit per element for efficient null tracking Uses UInt64 words with SIMD acceleration for bulk operations

Defined in:

crysda/columns.cr

Constant Summary

SIMD_THRESHOLD = 4

SIMD threshold - use SIMD for bitmaps with >= this many words

Constructors

• .build(size : Int32, &) : NullBitmap

  Build bitmap directly from parsing - avoids intermediate Array(T?)

• .from_nullable(arr : Array) : NullBitmap
• .new(size : Int32)
• .none(size : Int32) : NullBitmap

Instance Method Summary

• #&(other : NullBitmap) : NullBitmap

  Optimized AND - uses SIMD for large bitmaps

• #[](index : Int32) : Bool
• #|(other : NullBitmap) : NullBitmap

  Optimized OR - uses SIMD for large bitmaps

• #any? : Bool
• #clear(index : Int32) : Nil
• #count : Int32

  Optimized count using SIMD popcount where available

• #none? : Bool
• #set(index : Int32) : Nil
• #size : Int32

Constructor Detail

Instance Method Detail