jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

anton0xf

extract bookmarks:

$ gio info -a "metadata::evince::bookmarks" coq-art.pdf \
    | sed -n '/metadata::/ s/^.*: //p' > coq-art.bookmarks

and restore its by:

gio set coq-art.pdf 'metadata::evince::bookmarks' "$(cat coq-art.bookmarks)"