## `bytes` -- the memory used by the current MuPAD session

#### Introduction

`bytes(``)` returns the current memory consumption.

#### Call(s)

`bytes()`

#### Returns

a sequence of three integers.

#### Related Functions

`rtime`, `share`, `time`

#### Details

- `bytes` returns the following three numbers:
  - The number of bytes used logically; this is the amount of memory which is actually used for storing MuPAD data.
  - The number of bytes physically allocated by the memory management; this is the amount of memory MuPAD has allocated from the operating system. The difference between the physical and the logical bytes is the amount of memory which has alread been reserved for further calculations.
  - On computers with a virtual memory, the third number is the constant 2^31 - 1. On other computers such as the Apple Macintosh, the remaining free space (on the program heap) is returned.
- `bytes` is a function of the system kernel.

#### Example 1

In a freshly started MuPAD session, `bytes` may return the following data on the memory consumption of the session:

    >> bytes()

                                  506584, 717312, 2147483647

Each computation increases the memory usage:

    >> int(x, x): bytes()

                                 2040956, 2201624, 2147483647

#### Changes

- no changes

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