The cost of I/O
Karl Wettin <[email protected]> Thu, 9 Mar 2017 17:08:23 +0100
| Newsgroups | gmane.comp.java.prevayler |
|---|---|
| Message-ID | <[email protected]> |
--===============3019410345774540926== Content-Type: multipart/alternative; boundary="Apple-Mail=_70691173-9517-4D33-B89E-174A1EF4706C" --Apple-Mail=_70691173-9517-4D33-B89E-174A1EF4706C Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii A colleague of mine understood why and really how fast prevalence is = after seeing this chart on cost of I/O: L1-cache 3 cycles L2-cache 14 cycles RAM 250 cycles Disk 41 000 000 cycles Network 240 000 000 cycles It really says it all. karl= --Apple-Mail=_70691173-9517-4D33-B89E-174A1EF4706C Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html = charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" = class=3D""><div class=3D""><font face=3D"Courier New" = class=3D"">A colleague of mine understood why and really how fast = prevalence is after seeing this chart on cost of I/O:</font></div><font = face=3D"Courier New" class=3D""><div class=3D""><font face=3D"Courier = New" class=3D""><br class=3D""></font></div>L1-cache = 3 cycles</font><div class=3D""><font = face=3D"Courier New" class=3D"">L2-cache = 14 cycles</font></div><div class=3D""><font = face=3D"Courier New" class=3D"">RAM = 250 cycles</font></div><div class=3D""><font = face=3D"Courier New" class=3D"">Disk 41 000 = 000 cycles</font></div><div class=3D""><font face=3D"Courier New" = class=3D"">Network 240 000 000 cycles</font></div><div = class=3D""><font face=3D"Courier New" class=3D""><br = class=3D""></font></div><div class=3D""><font face=3D"Courier New" = class=3D""><br class=3D""></font></div><div class=3D""><font = face=3D"Courier New" class=3D"">It really says it all.</font></div><div = class=3D""><font face=3D"Courier New" class=3D""><br = class=3D""></font></div><div class=3D""><font face=3D"Courier New" = class=3D""><br class=3D""></font></div><div class=3D""><font = face=3D"Courier New" class=3D""><br class=3D""></font></div><div = class=3D""><font face=3D"Courier New" class=3D""><br = class=3D""></font></div><div class=3D""><span class=3D"Apple-tab-span" = style=3D"font-family: 'Courier New'; white-space: pre;"> = </span><span style=3D"font-family: 'Courier New';" = class=3D"">karl</span></div></body></html>= --Apple-Mail=_70691173-9517-4D33-B89E-174A1EF4706C-- --===============3019410345774540926== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------------ Announcing the Oxford Dictionaries API! The API offers world-renowned dictionary content that is easy and intuitive to access. Sign up for an account today to start using our lexical data to power your apps and projects. Get started today and enter our developer competition. http://sdm.link/oxford --===============3019410345774540926== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ To unsubscribe go to the end of this page: http://lists.sourceforge.net/lists/listinfo/prevayler-discussion _______________________________________________ "Databases in Memoriam" -- http://www.prevayler.org --===============3019410345774540926==--