CLHS: Section 25.1.4.3

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## 25.1.4.3 Internal Time

Internal time represents time as a single integer, in terms of an implementation-dependent unit called an internal time unit. Relative time is measured as a number of these units. Absolute time is relative to an arbitrary time base.

The next figure shows defined names related to internal time.

    get-internal-real-time  internal-time-units-per-second
    get-internal-run-time

Figure 25-7. Defined names involving time in Internal Time.

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