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;; Convert this to add.wasm by running:
;;
;;   wat2wasm add.wat -o add.wasm
;;
(module
  (func (export "add") (param i32 i32) (result i32)
    get_local 0
    get_local 1
    i32.add))

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(module
  (import "env" "memory" (memory 1))
  (func $memcpy (export "memcpy") (param i32 i32 i32) (result i32)
    (local i32)
    (block (result i32)  ;; label = @1
      (set_local 3
        (get_local 0))
      (if  ;; label = @3
        (i32.eq
          (i32.and

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Bulk Memory Operations

Motivation

Some people have mentioned that memcpy and memmove functions are hot when profiling some WebAssembly benchmarks. Some examples:

• WebAssembly/design#236 (comment)

I've been looking at perf profiles for wasm unity benchmark a bit recently and see that some

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Proposed

Name	Opcodes	Size
is_lock_free	0xff00	1
wake	0xff01	1
i32.wait	0xff02	1
i64.wait	0xff03	1
available	0xff04..0xff0f	12
*.atomic.rmw*.*	0xff10..0xff1b	12

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#!/usr/bin/env python
import math
import os
import sys

def calculate(scx, expected_cycles, sprites):
  buckets = [0] * (((168 + scx + 7) // 8))
  scx &= 7
  total = scx
  if 0 in sprites:

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{"modules": [
  {"filename": "switch-spec.0.wasm", "commands": [
    {"type": "assert_return", "name": "$assert_return_0", "file": "third_party/testsuite/switch.wast", "line": 125},
    {"type": "assert_return", "name": "$assert_return_1", "file": "third_party/testsuite/switch.wast", "line": 126},
    {"type": "assert_return", "name": "$assert_return_2", "file": "third_party/testsuite/switch.wast", "line": 127},
    {"type": "assert_return", "name": "$assert_return_3", "file": "third_party/testsuite/switch.wast", "line": 128},
    {"type": "assert_return", "name": "$assert_return_4", "file": "third_party/testsuite/switch.wast", "line": 129},
    {"type": "assert_return", "name": "$assert_return_5", "file": "third_party/testsuite/switch.wast", "line": 130},
    {"type": "assert_return", "name": "$assert_return_6", "file": "third_party/testsuite/switch.wast", "line": 131},
    {"type": "assert_return", "name": "$assert_return_7", "file": "third_party/testsuite/switch.wast", "line": 132},

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doing stuff...
doing stuff...
chunk 0: used: 50000 size: 65536
chunk 1: used: 37020 size: 65536
chunk 2: used: 51000 size: 65536
chunk 3: used: 44000 size: 65536
chunk 4: used: 58000 size: 65536
chunk 5: used: 63000 size: 65536
chunk 6: used: 41000 size: 65536
chunk 7: used: 56000 size: 65536

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#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#include "benchmark/benchmark.h"

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t=0 A={64,36,35,42,33,61,59,58,126,45,44,46,32}L={0,254,195,3,224,135,231,127,
124,60,128,255,120,158,207,199,241,252,192,121,30,31,61,227,1,223,243,188,63,251
,190,193,28,156,62,248,143,7,126}D={2,3,3,4,1,5,6,7,8,9,10,1,11,12,13,14,15,16,4
,1,10,14,7,17,18,10,1,19,3,20,21,15,15,3,22,21,11,7,17,18,23,2,24,25,13,14,15,26
,27,13,21,11,7,8,28,29,19,7,25,13,2,3,30,3,8,21,11,7,25,10,29,31,7,32,13,21,19,
27,27,13,33,34,7,25,10,35,15,16,24,20,21,19,24,27,8,36,37,7,25,10,10,31,38,39,13
}B=bit32 M=math I=io.write T=string.char P=print S=M.sin C=M.cos F=M.floor b={}
for i=1,1200 do b[i]=0 end for i,v in ipairs(D)do w=L[v]for j=1,8 do if B.band(w
,1)==1 then b[160-48+i*8+j]=1 end w=B.rshift(w,1)end end P("\\x1b[2J") for w=1,
4720 do P("\\x1b[H")s=1.06*S(t*.07)^2 for i=1,1200 do x=s*((i%60)-34)+34 y=s*(F(i

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-- See original here http://www.a1k0n.net/2006/09/15/obfuscated-c-donut.html

            A=0 B=0 z={}b=
         {}E={32,46,44,45,126,
       58,59,61,33,42,35,36,64}S
     =math.sin C=math.cos F=math.
  floor I=io.write T=string.char W=60
  P=print H=25 P("\\x1b[2J")for w=1,240
 do for o=0,W*H do b[o]=1 z[o]=0 end e=
 S(A)g=C(A)m=C(B)n=S(B)for j=0,6.28,.09