java.lang.Object
- org.ejml.EjmlParameters

```
public class EjmlParameters
extends java.lang.Object
```
This is a list of parameters that are used across the code. To tune performance for a particular system change these values.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class EjmlParameters.MemoryUsage

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`BLOCK_SIZE`	Number of elements in a block.
`static int`	`BLOCK_WIDTH`	In modern computers there are high speed memory caches.
`static int`	`BLOCK_WIDTH_CHOL`
`static int`	`CMULT_COLUMN_SWITCH`
`static int`	`CMULT_TRANAB_COLUMN_SWITCH`
`static EjmlParameters.MemoryUsage`	`MEMORY`	Used to adjust which algorithms are used.
`static int`	`MULT_COLUMN_SWITCH`	At what point does it switch from a small matrix multiply to the reorder version.
`static int`	`MULT_INNER_SWITCH`
`static int`	`MULT_TRANAB_COLUMN_SWITCH`
`static int`	`SWITCH_BLOCK64_CHOLESKY`	At which point should it switch to the block cholesky algorithm.
`static int`	`SWITCH_BLOCK64_QR`
`static float`	`TOL32`
`static double`	`TOL64`
`static int`	`TRANSPOSE_SWITCH`

Constructor Summary

Constructors
Constructor Description

EjmlParameters()

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - TOL32
```
public static final float TOL32
```
    See Also:
    
    Constant Field Values
  - TOL64
```
public static final double TOL64
```
    See Also:
    
    Constant Field Values
  - MEMORY
```
public static EjmlParameters.MemoryUsage MEMORY
```
    Used to adjust which algorithms are used. Often there is a trade off between memory usage and speed.
  - BLOCK_WIDTH
```
public static int BLOCK_WIDTH
```
    In modern computers there are high speed memory caches. It is assumed that a square block with this width can be contained entirely in one of those caches. Settings this value too large can have a dramatic effect on performance in some situations. Setting it too low results in a less dramatic performance hit. The optimal value is dependent on the computer's memory architecture.
  - BLOCK_WIDTH_CHOL
```
public static int BLOCK_WIDTH_CHOL
```
  - BLOCK_SIZE
```
public static int BLOCK_SIZE
```
    Number of elements in a block.
  - TRANSPOSE_SWITCH
```
public static int TRANSPOSE_SWITCH
```
  - MULT_COLUMN_SWITCH
```
public static int MULT_COLUMN_SWITCH
```
    At what point does it switch from a small matrix multiply to the reorder version.
  - MULT_TRANAB_COLUMN_SWITCH
```
public static int MULT_TRANAB_COLUMN_SWITCH
```
  - MULT_INNER_SWITCH
```
public static int MULT_INNER_SWITCH
```
  - CMULT_COLUMN_SWITCH
```
public static int CMULT_COLUMN_SWITCH
```
  - CMULT_TRANAB_COLUMN_SWITCH
```
public static int CMULT_TRANAB_COLUMN_SWITCH
```
  - SWITCH_BLOCK64_CHOLESKY
```
public static int SWITCH_BLOCK64_CHOLESKY
```
    At which point should it switch to the block cholesky algorithm.
    
    In benchmarks the basic actually performed slightly better at 1000 but in JVM 1.6 it some times get stuck in a mode where the basic version was very slow in that case the block performed much better.
  - SWITCH_BLOCK64_QR
```
public static int SWITCH_BLOCK64_QR
```
- Constructor Detail
  - EjmlParameters
```
public EjmlParameters()
```

Class EjmlParameters

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

TOL32

TOL64

MEMORY

BLOCK_WIDTH

BLOCK_WIDTH_CHOL

BLOCK_SIZE

TRANSPOSE_SWITCH

MULT_COLUMN_SWITCH

MULT_TRANAB_COLUMN_SWITCH

MULT_INNER_SWITCH

CMULT_COLUMN_SWITCH

CMULT_TRANAB_COLUMN_SWITCH

SWITCH_BLOCK64_CHOLESKY

SWITCH_BLOCK64_QR

Constructor Detail

EjmlParameters