`high_resolution_clock` struct

Represents a high_resolution clock with the smallest possible tick period. Specifically, the period is a nanosecond, or ratio<1, 1000000000>

In Microsoft's implementation, high_resolution_clock is a synonym for steady_clock.

Syntax

using high_resolution_clock = steady_clock;

Name	Description
`high_resolution_clock::duration`	In Microsoft's implementation, it's a synonym for `nanoseconds`, which is defined as `duration<long long, nano>`. It represents a duration of time measured in billionths of a second.
`high_resolution_clock::period`	In Microsoft's implementation, it's a synonym for `nano`, which is defined as `std::ratio<1i64, 1000000000i64>` . It represents the time in seconds (one billionth of a second) between each tick in the duration.
`high_resolution_clock::rep`	A synonym for `long long`, which is the type used in the Microsoft implementation to represent the number of clock ticks in a `high_resolution_clock::duration`.
`high_resolution_clock::time_point`	A synonym for `time_point<steady_clock>`. Used to represent a `time_point` for this clock.

Name	Description
`now`	Returns the current `high_resolution_clock` time.

Name	Description
`is_steady`	Holds `true`. A `high_resolution_clock` is steady. That means you can use this clock to take the time before an event, the time after an event, and reliably subtract them to get the duration of the event because the clock won't be adjusted during that time.

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