| const fs = require('fs') | |
| const path = require('path') | |
| const memset = (mem, data, offset) => { | |
| const asBytes = new Uint8Array(mem.buffer, offset, data.length) | |
| asBytes.set(data) | |
| } | |
| const memget = (mem, offset, length) => { | |
| return Buffer.from(new Uint8Array(mem.buffer, offset, length)) |
State tests were executed and execution time of the expmod(B, E, M) instruction in the MODEXP precompile were measured for master and the PR which uses BN.red for computing MODEXP.
The measurements are in millisecond, and they've been sorted to give an idea of generally how long the two approaches take. Corresponding lines in the two files do not necessarily represent the same modexp operation.
As a first step to profile ethereumjs-vm, I used clinic on a couple of existing tests. To get a flamegraph of the blockchain tests, run:
NODE_OPTIONS="--max-old-space-size=4096" clinic flame -- node ./tests/tester.js -b --excludeDir='GeneralStateTests'The image in this gist is the result of running this command on my personal computer.
| npm ERR! path /data/home/s1na/dev/eth/zos-lib/examples/complex/node_modules/.staging/zos-lib-5f365ef1/node_modules/@mrmlnc/readdir-enhanced | |
| npm ERR! code ENOENT | |
| npm ERR! errno -2 | |
| npm ERR! syscall rename | |
| npm ERR! enoent ENOENT: no such file or directory, rename '/data/home/s1na/dev/eth/zos-lib/examples/complex/node_modules/.staging/zos-lib-5f365ef1/node_modules/@mrmlnc/readdir-enhanced' -> '/data/home/s1na/dev/eth/zos-lib/examples/complex/node_modules/.staging/@mrmlnc/readdir-enhanced-ff250cb7' | |
| npm ERR! enoent This is related to npm not being able to find a file. | |
| npm ERR! enoent |
| ================== | |
| WARNING: DATA RACE | |
| Read at 0x00c4204329f0 by goroutine 33: | |
| github.com/ipfs/ipfs-cluster/consensus/raft.(*Consensus).finishBootstrap() | |
| /go/src/github.com/ipfs/ipfs-cluster/consensus/raft/consensus.go:119 +0x123 | |
| Previous write at 0x00c4204329f0 by goroutine 18: | |
| github.com/ipfs/ipfs-cluster/consensus/raft.(*Consensus).SetClient() | |
| /go/src/github.com/ipfs/ipfs-cluster/consensus/raft/consensus.go:179 +0x48 | |
| github.com/ipfs/ipfs-cluster.(*Cluster).setupRPCClients() |