yutelin

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <secp256k1.h>

int main() {
    secp256k1_context* ctx;
    secp256k1_pubkey pubkey;
    const unsigned char *seckey = (unsigned  char*) "Secret Key Br0!";

yutelin

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

yutelin

    diff --git a/eth/fetcher/fetcher.go b/eth/fetcher/fetcher.go
    index d88d919..f03fd30 100644
    --- a/eth/fetcher/fetcher.go
    +++ b/eth/fetcher/fetcher.go
    @@ -34,7 +34,7 @@ import (
     const (
        arriveTimeout = 500 * time.Millisecond // Time allowance before an announced block is explicitlrd
        gatherSlack   = 100 * time.Millisecond // Interval used to collate almost-expired announces witfs
    -   fetchTimeout  = 5 * time.Second        // Maximum alloted time to return an explicitly requestebk
    +   fetchTimeout  = 1 * time.Second        // Maximum alloted time to return an explicitly requestebk