I think in my test code, what affect the performance maybe the cpu branches
misses? The row num is bigger than the column num, so in column-wise
traverse, the inner loop is easier to predict.
perf result:
row-wise
0.034014712741,811 branch-misses #
1.05%
On Sun, Sep 29, 2019 at 2:04 PM Joe McGuckin wrote:
> If i have multiple goroutines listening on the same channel, then write
> something to the channel, will all goroutines receive the value, or only
> the ‘next’ available goroutine (as determined by the scheduler)
>
Channels are queues:
If i have multiple goroutines listening on the same channel, then write
something to the channel, will all goroutines receive the value, or only the
‘next’ available goroutine (as determined by the scheduler)
Thanks,
Joe
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"undeclared name".
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On my machine using an intel 9880H with a L2 Cache: Unified, 256 KiB, 4-way set
associative,
rows vs. columns performance is basically the same as long as the array size
fits into the L2 cache.
This seems to be the case for a rowSize = colSize = 180. For slightly higher
values (190) the
Use net.JoinHostPort to concatenate the values you have in the struct
and pass the to http.Server struct.
if _, err := toml.Decode("config.toml", ); err != nil {
// handle error
}
addr, err := net.JoinHostPort(conf.Address, conf.PORT)
if err != nil {
// handle error
}
src
The test code is below:
package main
import (
"testing"
)
const rowSize = 100
const colSize = 100
var array [rowSize][colSize]int
func BenchmarkRow(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
sum := 0
for r := 0; r < rowSize; r++ {
for c := 0; c < colSize; c++ {
sum +=
Hi,
How I can use the .toml file to parse IP address and port to simple http
server instead of using flags
I have a config.toml file which contains these parameters in
PORT = "8000"
Address = "localhost"
//Parameters type struct as
type Config struct {
PORTstring
Address string
}
I can
ORM is a tool. It's not good or bad. Every tool, every language and
everything has limits. If you like spending time on writing and debugging
raw SQL - go ahead. The difference and very obvious in this discussion, is
that those who are not against ORM not trying to convince other party to
only use
