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+Memory usage
+============
+
+(Highly unscientific.)
+
+Command used to gather static memory usage:
+
+```sh
+grep ^Vm "/proc/$(ps fax | grep [m]etrics-bench | awk '{print $1}')/status"
+```
+
+Program used to gather baseline memory usage:
+
+```go
+package main
+
+import "time"
+
+func main() {
+ time.Sleep(600e9)
+}
+```
+
+Baseline
+--------
+
+```
+VmPeak: 42604 kB
+VmSize: 42604 kB
+VmLck: 0 kB
+VmHWM: 1120 kB
+VmRSS: 1120 kB
+VmData: 35460 kB
+VmStk: 136 kB
+VmExe: 1020 kB
+VmLib: 1848 kB
+VmPTE: 36 kB
+VmSwap: 0 kB
+```
+
+Program used to gather metric memory usage (with other metrics being similar):
+
+```go
+package main
+
+import (
+ "fmt"
+ "metrics"
+ "time"
+)
+
+func main() {
+ fmt.Sprintf("foo")
+ metrics.NewRegistry()
+ time.Sleep(600e9)
+}
+```
+
+1000 counters registered
+------------------------
+
+```
+VmPeak: 44016 kB
+VmSize: 44016 kB
+VmLck: 0 kB
+VmHWM: 1928 kB
+VmRSS: 1928 kB
+VmData: 36868 kB
+VmStk: 136 kB
+VmExe: 1024 kB
+VmLib: 1848 kB
+VmPTE: 40 kB
+VmSwap: 0 kB
+```
+
+**1.412 kB virtual, TODO 0.808 kB resident per counter.**
+
+100000 counters registered
+--------------------------
+
+```
+VmPeak: 55024 kB
+VmSize: 55024 kB
+VmLck: 0 kB
+VmHWM: 12440 kB
+VmRSS: 12440 kB
+VmData: 47876 kB
+VmStk: 136 kB
+VmExe: 1024 kB
+VmLib: 1848 kB
+VmPTE: 64 kB
+VmSwap: 0 kB
+```
+
+**0.1242 kB virtual, 0.1132 kB resident per counter.**
+
+1000 gauges registered
+----------------------
+
+```
+VmPeak: 44012 kB
+VmSize: 44012 kB
+VmLck: 0 kB
+VmHWM: 1928 kB
+VmRSS: 1928 kB
+VmData: 36868 kB
+VmStk: 136 kB
+VmExe: 1020 kB
+VmLib: 1848 kB
+VmPTE: 40 kB
+VmSwap: 0 kB
+```
+
+**1.408 kB virtual, 0.808 kB resident per counter.**
+
+100000 gauges registered
+------------------------
+
+```
+VmPeak: 55020 kB
+VmSize: 55020 kB
+VmLck: 0 kB
+VmHWM: 12432 kB
+VmRSS: 12432 kB
+VmData: 47876 kB
+VmStk: 136 kB
+VmExe: 1020 kB
+VmLib: 1848 kB
+VmPTE: 60 kB
+VmSwap: 0 kB
+```
+
+**0.12416 kB virtual, 0.11312 resident per gauge.**
+
+1000 histograms with a uniform sample size of 1028
+--------------------------------------------------
+
+```
+VmPeak: 72272 kB
+VmSize: 72272 kB
+VmLck: 0 kB
+VmHWM: 16204 kB
+VmRSS: 16204 kB
+VmData: 65100 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 80 kB
+VmSwap: 0 kB
+```
+
+**29.668 kB virtual, TODO 15.084 resident per histogram.**
+
+10000 histograms with a uniform sample size of 1028
+---------------------------------------------------
+
+```
+VmPeak: 256912 kB
+VmSize: 256912 kB
+VmLck: 0 kB
+VmHWM: 146204 kB
+VmRSS: 146204 kB
+VmData: 249740 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 448 kB
+VmSwap: 0 kB
+```
+
+**21.4308 kB virtual, 14.5084 kB resident per histogram.**
+
+50000 histograms with a uniform sample size of 1028
+---------------------------------------------------
+
+```
+VmPeak: 908112 kB
+VmSize: 908112 kB
+VmLck: 0 kB
+VmHWM: 645832 kB
+VmRSS: 645588 kB
+VmData: 900940 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 1716 kB
+VmSwap: 1544 kB
+```
+
+**17.31016 kB virtual, 12.88936 kB resident per histogram.**
+
+1000 histograms with an exponentially-decaying sample size of 1028 and alpha of 0.015
+-------------------------------------------------------------------------------------
+
+```
+VmPeak: 62480 kB
+VmSize: 62480 kB
+VmLck: 0 kB
+VmHWM: 11572 kB
+VmRSS: 11572 kB
+VmData: 55308 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 64 kB
+VmSwap: 0 kB
+```
+
+**19.876 kB virtual, 10.452 kB resident per histogram.**
+
+10000 histograms with an exponentially-decaying sample size of 1028 and alpha of 0.015
+--------------------------------------------------------------------------------------
+
+```
+VmPeak: 153296 kB
+VmSize: 153296 kB
+VmLck: 0 kB
+VmHWM: 101176 kB
+VmRSS: 101176 kB
+VmData: 146124 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 240 kB
+VmSwap: 0 kB
+```
+
+**11.0692 kB virtual, 10.0056 kB resident per histogram.**
+
+50000 histograms with an exponentially-decaying sample size of 1028 and alpha of 0.015
+--------------------------------------------------------------------------------------
+
+```
+VmPeak: 557264 kB
+VmSize: 557264 kB
+VmLck: 0 kB
+VmHWM: 501056 kB
+VmRSS: 501056 kB
+VmData: 550092 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 1032 kB
+VmSwap: 0 kB
+```
+
+**10.2932 kB virtual, 9.99872 kB resident per histogram.**
+
+1000 meters
+-----------
+
+```
+VmPeak: 74504 kB
+VmSize: 74504 kB
+VmLck: 0 kB
+VmHWM: 24124 kB
+VmRSS: 24124 kB
+VmData: 67340 kB
+VmStk: 136 kB
+VmExe: 1040 kB
+VmLib: 1848 kB
+VmPTE: 92 kB
+VmSwap: 0 kB
+```
+
+**31.9 kB virtual, 23.004 kB resident per meter.**
+
+10000 meters
+------------
+
+```
+VmPeak: 278920 kB
+VmSize: 278920 kB
+VmLck: 0 kB
+VmHWM: 227300 kB
+VmRSS: 227300 kB
+VmData: 271756 kB
+VmStk: 136 kB
+VmExe: 1040 kB
+VmLib: 1848 kB
+VmPTE: 488 kB
+VmSwap: 0 kB
+```
+
+**23.6316 kB virtual, 22.618 kB resident per meter.**