methane

=== time ===
         iostream.py:708           write_to_fd 49.797434
         iostream.py:773           set_nodelay 31.600270
         iostream.py:696          read_from_fd 15.023633
           kqueue.py:67                   poll 2.160702
<frozen importlib._bootstrap>:1879 _path_importer_cache 0.101283
<frozen importlib._bootstrap>:656     _compile_bytecode 0.101283
              web.py:1379           <listcomp> 0.067522
              web.py:1378    _generate_headers 0.067522
<frozen importlib._bootstrap>:321  _call_with_frames_removed 0.033761

methane

         474286 function calls (468756 primitive calls) in 38.130 seconds

   Ordered by: call count

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    38848    0.016    0.000    0.023    0.000 {built-in method isinstance}
24354/24259    0.004    0.000    0.004    0.000 {built-in method len}
    13000    0.012    0.000    0.023    0.000 escape.py:193(utf8)
12012/12011    0.004    0.000    0.007    0.000 {method 'encode' of 'str' objects}
    11202    0.013    0.000    0.013    0.000 {built-in method hasattr}

methane

#micro benchmark
#CPython 3.4.1

import timeit
print(timeit.timeit("utf8('xyzzy')", "from tornado.escape import utf8"))

# $ TORNADO_EXTENSION=1 python u8bench.py
# 0.0813535709748976
# $ TORNADO_NO_EXTENSION=1 python u8bench.py
# 0.8695125280064531

methane

package main

import (
	"bufio"
	"bytes"
	"errors"
	"fmt"
	"log"
	"net"
	"os"

methane

package main

import (
	"io"
	"log"
	"net"
	"sync"
	"time"
)

methane

methane@raring:~$ uname -a
Linux raring 3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
methane@raring:~$ gcc -O2 -o gt gt.c
methane@raring:~$ time ./gt
called 1000000 times, last value is 1412062858.602343

real	0m2.219s
user	0m2.215s
sys 0m0.005s

methane

YYY YYY
RRR RRR
BBB BBB
GGG GGG

methane

package main

import (
	"log"
	"net/http"
)

func hello(w http.ResponseWriter, r *http.Request) {
	w.Header().Add("Content-Type", "text/plain")
	w.Write([]byte("Hello, World."))

methane

ROUTINE ====================== net/http.ReadRequest
    11    403 samples (flat, cumulative) 27.2% of total
-------------------- /home/ec2-user/local/go/src/net/http/request.go
     2      2   591: func ReadRequest(b *bufio.Reader) (req *Request, err error) {
     .      .      447b70: FS MOVQ FS:0xfffffff0, CX
     2      2      447b79: LEAQ 0xffffff30(SP), AX
     .      .      447b81: CMPQ 0x10(CX), AX
     .      .      447b85: JA 0x447b8e
     .      .      447b87: CALL runtime.morestack_noctxt(SB)
     .      .      447b8c: JMP net/http.ReadRequest(SB)

methane

$ python -c "import sys; print(sys.stdout.encoding)"
UTF-8
$ python -c "import sys; print(sys.stdout.encoding)" | cat
None
$ PYTHONIOENCODING=utf-8 python -c "import sys; print(sys.stdout.encoding)" | cat
utf-8
$ python3 -c "import sys; print(sys.stdout.encoding)"
UTF-8
$ python3 -c "import sys; print(sys.stdout.encoding)" | cat
UTF-8