Time
#
| Time |
Value |
| Seconds in day |
86400 |
| Hours in month |
730 |
| Hours in week |
168 |
| Value |
Numerical |
Exponent |
| 1 ms |
0.001 |
$10^{-3}$ |
| 1 us |
0.000001 |
$10^{-6}$ |
| 1 ns |
0.0000000001 |
$10^{-9}$ |
| Route |
Distance |
Time, light in vacuum |
Time, light in fiber |
Round-trip time (RTT) in fiber |
| NY to SF |
4,148 km |
14 ms |
21 ms |
42 ms |
| NY to London |
5,585 km |
19 ms |
28 ms |
56 ms |
| NY to Sydney |
15,993 km |
53 ms |
80 ms |
160 ms |
| Equatorial circumference |
40,075 km |
133.7 ms |
200 ms |
200 ms |
User experience
#
| Time |
Perception |
| 100-200 ms |
“lag” |
300 ms | “sluggish”
1000 ms (1 s) | metal context switch
Latency
#
Jeff Dean
MB vs MiB / GB vs GiB chart
#
| Decimal Name |
Decimal Abbr. |
Decimal Power |
Decimal Value |
Binary Name |
Binary Abbr |
Binary Power |
Binary Value |
| Kilobyte |
kB |
$10^{3}$ |
1000 |
KibiByte |
kiB |
$2^{10}$ |
1024 |
| Megabyte |
MB |
$10^{6}$ |
1,000,000 |
MebiByte |
MiB |
$2^{20}$ |
1,048,576 |
| Gigabyte |
GB |
$10^{9}$ |
1,000,000,000 |
GibiByte |
GiB |
$2^{30}$ |
1,073,741,824 |
| Terabyte |
TB |
$10^{12}$ |
1,000,000,000,000 |
TebiByte |
TiB |
$2^{40}$ |
1,099,511,627,776 |
Data
#
| Unit |
Bits |
Exponent |
| 1 Mbps |
1,000,000 |
$10^6$ |
| 1 nibble |
4 bits |
|
| 1 byte |
8 bits |
|
