| require "benchmark" | |
| def fake_cos(x : Float64) : Float64 | |
| 1.0 | |
| end | |
| def taylor_cos(x : Float64) : Float64 | |
| x = x.abs | |
| kf, x = x.divmod(Math::PI) | |
| k = kf.to_i |
| /* | |
| * | |
| * Copyright 2015 gRPC authors. | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * |
| package main | |
| const TableSize = uint16(1 << 14) | |
| type Table []uint16 | |
| type Shard struct { | |
| Hash uint64 | |
| Weight float64 | |
| } |
| let handlers = {} | |
| handlers.get = function(target, property) { | |
| let v = target[property] | |
| if (typeof(v) == "function") { | |
| return async (...args) => { | |
| return new Promise((resolve, reject) => { | |
| target[property](...args, (err, ...rest) => { | |
| if (err) reject(err) | |
| else resolve(rest.length == 1 ? rest[0] : rest) |
| class HashChTbl(K, V) | |
| include Enumerable({K, V}) | |
| include Iterable({K, V}) | |
| getter size : Int32 = 0 | |
| # index into SIZES array | |
| @sz : UInt8 = 0_u8 | |
| @rebuild_num : UInt16 = 0_u16 | |
| @first : UInt32 = 0_u32 | |
| @last : UInt32 = 0_u32 |
| [gui] | |
| spellingdictionary = en_US | |
| tabsize = 4 | |
| fontui = -family \"DejaVu Sans\" -size 10 -weight normal -slant roman -underline 0 -overstrike 0 | |
| fontdiff = -family \"DejaVu Sans Mono\" -size 10 -weight normal -slant roman -underline 0 -overstrike 0 | |
| [user] | |
| emal = funny.falcon@gmail.com | |
| email = funny.falcon@gmail.com | |
| name = Sokolov Yura | |
| [http] |
| 26-5-1 11 x^64 + x^36 + x^32 + x^30 + x^28 + x^26 + x^24 + x^15 + x^13 + x^4 + 1 | |
| 2-7-21 11 x^64 + x^35 + x^34 + x^32 + x^19 + x^18 + x^8 + x^4 + x^3 + x^2 + 1 | |
| 5-27-18 11 x^64 + x^32 + x^26 + x^20 + x^18 + x^12 + x^9 + x^6 + x^5 + x^4 + 1 | |
| 1-2-11 13 x^64 + x^41 + x^35 + x^33 + x^32 + x^18 + x^11 + x^9 + x^6 + x^3 + x^2 + x + 1 | |
| 20-7-3 13 x^64 + x^52 + x^44 + x^40 + x^32 + x^24 + x^21 + x^16 + x^14 + x^12 + x^8 + x^4 + 1 | |
| 23-8-1 15 x^64 + x^47 + x^41 + x^36 + x^32 + x^27 + x^26 + x^23 + x^22 + x^13 + x^11 + x^10 + x^6 + x^4 + 1 | |
| 5-27-21 15 x^64 + x^33 + x^32 + x^29 + x^27 + x^23 + x^21 + x^15 + x^13 + x^10 + x^7 + x^6 + x^5 + x^3 + 1 | |
| 10-13-6 17 x^64 + x^42 + x^39 + x^38 + x^37 + x^34 + x^31 + x^29 + x^28 + x^26 + x^24 + x^23 + x^21 + x^16 + x^14 + x^12 + 1 | |
| 17-1-18 17 x^64 + x^37 + x^35 + x^32 + x^31 + x^27 + x^23 + x^21 + x^19 + x^16 + x^15 + x^13 + x^9 + x^7 + x^3 + x + 1 | |
| 18-7-16 17 x^64 + x^47 + x^46 + x^41 + x^40 + x^34 + x^31 + x^25 + x^22 + x^20 + x^15 + x^14 + x^12 + x^10 + x^9 + x^8 + 1 |
| require "secure_random" | |
| require "static_array" | |
| module Hashing | |
| alias Type = UInt32 | |
| @@seed = uninitialized StaticArray(UInt32, 6) | |
| struct StdHasher | |
| # lucky777 hash https://github.com/funny-falcon/fanom_hash/blob/master/lucky777.h | |
| struct Impl |
it has up to 25% less size (19% on smallest tables)
it is a bit slower on small tables (~3%) for hit and a bit faster for miss
due to additional mix of key bits, it is always faster on big tables.
Note: bit mixing makes small tables slower, so it is enabled only for big tables (>64 capacity).
If performance for small tables much more important, mixing could be removed completely (this will return 1% on hit)
| package main | |
| import ( | |
| "flag" | |
| "fmt" | |
| "log" | |
| "net/rpc" | |
| "sync" | |
| "time" | |
| ) |