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* add automatic cache max size generation based on ratios of a singular fixed memory target Signed-off-by: kim <grufwub@gmail.com> * remove now-unused cache max-size config variables Signed-off-by: kim <grufwub@gmail.com> * slight ratio tweak Signed-off-by: kim <grufwub@gmail.com> * remove unused visibility config var Signed-off-by: kim <grufwub@gmail.com> * add secret little ratio config trick Signed-off-by: kim <grufwub@gmail.com> * fixed a word Signed-off-by: kim <grufwub@gmail.com> * update cache library to remove use of TTL in result caches + slice cache Signed-off-by: kim <grufwub@gmail.com> * update other cache usages to use correct interface Signed-off-by: kim <grufwub@gmail.com> * update example config to explain the cache memory target Signed-off-by: kim <grufwub@gmail.com> * update env parsing test with new config values Signed-off-by: kim <grufwub@gmail.com> * do some ratio twiddling Signed-off-by: kim <grufwub@gmail.com> * add missing header * update envparsing with latest defaults Signed-off-by: kim <grufwub@gmail.com> * update size calculations to take into account result cache, simple cache and extra map overheads Signed-off-by: kim <grufwub@gmail.com> * tweak the ratios some more Signed-off-by: kim <grufwub@gmail.com> * more nan rampaging Signed-off-by: kim <grufwub@gmail.com> * fix envparsing script Signed-off-by: kim <grufwub@gmail.com> * update cache library, add sweep function to keep caches trim Signed-off-by: kim <grufwub@gmail.com> * sweep caches once a minute Signed-off-by: kim <grufwub@gmail.com> * add a regular job to sweep caches and keep under 80% utilisation Signed-off-by: kim <grufwub@gmail.com> * remove dead code Signed-off-by: kim <grufwub@gmail.com> * add new size library used to libraries section of readme Signed-off-by: kim <grufwub@gmail.com> * add better explanations for the mem-ratio numbers Signed-off-by: kim <grufwub@gmail.com> * update go-cache Signed-off-by: kim <grufwub@gmail.com> * library version bump Signed-off-by: kim <grufwub@gmail.com> * update cache.result{} size model estimation Signed-off-by: kim <grufwub@gmail.com> --------- Signed-off-by: kim <grufwub@gmail.com> |
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size.go |
size - calculates variable's memory consumption at runtime
Part of the Transflow Project
Sometimes you may need a tool to measure the size of object in your Go program at runtime. This package makes an attempt to do so. Package based on binary.Size()
from Go standard library.
Features:
- supports non-fixed size variables and struct fields:
struct
,int
,slice
,string
,map
; - supports complex types including structs with non-fixed size fields;
- supports all basic types (numbers, bool);
- supports
chan
andinterface
; - supports pointers;
- implements infinite recursion detection (i.e. pointer inside struct field references to parent struct).
Usage example
package main
import (
"fmt"
// Use latest tag.
"github.com/DmitriyVTitov/size"
)
func main() {
a := struct {
a int
b string
c bool
d int32
e []byte
f [3]int64
}{
a: 10, // 8 bytes
b: "Text", // 16 (string itself) + 4 = 20 bytes
c: true, // 1 byte
d: 25, // 4 bytes
e: []byte{'c', 'd', 'e'}, // 24 (slice itself) + 3 = 27 bytes
f: [3]int64{1, 2, 3}, // 3 * 8 = 24 bytes
} // 84 + 3 (padding) = 87 bytes
fmt.Println(size.Of(a))
}
// Output: 87