perf report for exp.js

perf_modifiednode.txt

    25.40%node  libc-2.17.so   [.] memchr
    16.84%node  [kernel.kallsyms]   [k] copy_user_enhanced_fast_string
    10.57%node  node [.] v8::internal::StringSearch<unsigned char, unsigned char>::LinearSearch(v8::internal::StringSearch<unsigned char, unsigned char>*, v8::internal::Vector<unsigned char const>, int)
    10.40%node  libc-2.17.so   [.] __memcpy_ssse3_back
    4.88%node  node [.] v8::internal::Factory::NewStringFromUtf8(v8::internal::Vector<char const>, v8::internal::PretenureFlag)
    1.95%node  [kernel.kallsyms]   [k] free_hot_cold_page
    1.77%node  [kernel.kallsyms]   [k] put_page
    1.05%node  [kernel.kallsyms]   [k] iowrite16
    1.04%node  perf-27128.map [.] Builtin:RegExpPrototypeExec
    1.01%node  [kernel.kallsyms]   [k] __do_softirq
    0.79%node  node [.] memchr@plt
    0.72%node  [kernel.kallsyms]   [k] get_page_from_freelist
    0.53%node  node [.] v8::internal::FixedArray::set(int, v8::internal::Object*)
    0.50%node  [kernel.kallsyms]   [k] tcp_recvmsg
    0.47%node  perf-27128.map [.] LazyCompile:*[Symbol.match] native regexp.js:226
    0.46%node  node [.] v8::internal::RegExpImpl::AtomExec(v8::internal::Handle<v8::internal::JSRegExp>, v8::internal::Handle<v8::internal::String>, int, v8::internal::Handle<v8::internal::JSObject>)
    0.43%node  node [.] v8::internal::Runtime_RegExpExec(int, v8::internal::Object**, v8::internal::Isolate*)
    0.36%node  perf-27128.map [.] LazyCompile:*res.on /home/gireesh/node/exp.js:46
    0.30%node  [virtio_ring]  [k] virtqueue_get_buf
    0.27%node  libc-2.17.so   [.] _int_malloc
    0.25%node  node [.] v8::internal::Object* v8::internal::VisitWeakList<v8::internal::JSFunction>(v8::internal::Heap*, v8::internal::Object*, v8::internal::WeakObjectRetainer*)

perf_originalnode.txt

    23.19%  node_org  libc-2.17.so       [.] memchr
    15.40%  node_org  [kernel.kallsyms]  [k] copy_user_enhanced_fast_string
     9.68%  node_org  node_org[.] v8::internal::StringSearch<unsigned char, unsigned char>::LinearSearch(v8::internal::StringSearch<unsigned char, unsigned char>*, v8::internal::Vector<unsigned char const>, int)
     9.08%  node_org  libc-2.17.so       [.] __memcpy_ssse3_back
     4.35%  node_org  node_org[.] v8::internal::Factory::NewStringFromUtf8(v8::internal::Vector<char const>, v8::internal::PretenureFlag)
     2.02%  node_org  [kernel.kallsyms]  [k] free_hot_cold_page
     1.95%  node_org  [kernel.kallsyms]  [k] put_page
     1.49%  node_org  [kernel.kallsyms]  [k] iowrite16
     0.98%  node_org  perf-29005.map     [.] Builtin:RegExpPrototypeExec
     0.72%  node_org  [kernel.kallsyms]  [k] tcp_recvmsg
     0.72%  node_org  node_org[.] memchr@plt
     0.52%  node_org  node_org[.] v8::internal::FixedArray::set(int, v8::internal::Object*)
     0.51%  node_org  libc-2.17.so       [.] _int_malloc
     0.50%  node_org  perf-29005.map     [.] LazyCompile:*[Symbol.match] native regexp.js:226
     0.48%  node_org  node_org[.] v8::internal::RegExpImpl::AtomExec(v8::internal::Handle<v8::internal::JSRegExp>, v8::internal::Handle<v8::internal::String>, int, v8::internal::Handle<v8::internal::JSObject>)
     0.46%  node_org  node_org[.] v8::internal::Runtime_RegExpExec(int, v8::internal::Object**, v8::internal::Isolate*)
     0.45%  node_org  perf-29005.map     [.] LazyCompile:*nextTick internal/process/next_tick.js:134
     0.41%  node_org  [kernel.kallsyms]  [k] sock_rfree
     0.39%  node_org  node_org[.] v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*)
     0.39%  node_org  perf-29005.map     [.] LazyCompile:*res.on  /exp.js:46