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Faster signatures #134

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726869a
Switch from Float64Array to Array
dchest Nov 11, 2017
328ee60
README: update benchmarks
dchest Nov 11, 2017
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24 changes: 12 additions & 12 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -430,28 +430,28 @@ Benchmarks
----------

For reference, here are benchmarks from MacBook Pro (Retina, 13-inch, Mid 2014)
laptop with 2.6 GHz Intel Core i5 CPU (Intel) in Chrome 53/OS X and Xiaomi Redmi
laptop with 2.6 GHz Intel Core i5 CPU (Intel) in Chrome 62/OS X and Xiaomi Redmi
Note 3 smartphone with 1.8 GHz Qualcomm Snapdragon 650 64-bit CPU (ARM) in
Chrome 52/Android:
Chrome 62/Android:

| | nacl.js Intel | nacl-fast.js Intel | nacl.js ARM | nacl-fast.js ARM |
| ------------- |:-------------:|:-------------------:|:-------------:|:-----------------:|
| salsa20 | 1.3 MB/s | 128 MB/s | 0.4 MB/s | 43 MB/s |
| poly1305 | 13 MB/s | 171 MB/s | 4 MB/s | 52 MB/s |
| salsa20 | 13 MB/s | 128 MB/s | 4.4 MB/s | 43 MB/s |
| poly1305 | 10 MB/s | 195 MB/s | 2 MB/s | 76 MB/s |
| hash | 4 MB/s | 34 MB/s | 0.9 MB/s | 12 MB/s |
| secretbox 1K | 1113 op/s | 57583 op/s | 334 op/s | 14227 op/s |
| box 1K | 145 op/s | 718 op/s | 37 op/s | 368 op/s |
| scalarMult | 171 op/s | 733 op/s | 56 op/s | 380 op/s |
| sign | 77 op/s | 200 op/s | 20 op/s | 61 op/s |
| sign.open | 39 op/s | 102 op/s | 11 op/s | 31 op/s |
| secretbox 1K | 5704 op/s | 79980 op/s | 334 op/s | 32949 op/s |
| box 1K | 148 op/s | 1039 op/s | 37 op/s | 576 op/s |
| scalarMult | 171 op/s | 1011 op/s | 56 op/s | 450 op/s |
| sign | 77 op/s | 498 op/s | 22 op/s | 218 op/s |
| sign.open | 39 op/s | 257 op/s | 12 op/s | 130 op/s |

(You can run benchmarks on your devices by clicking on the links at the bottom
of the [home page](https://tweetnacl.js.org)).

In short, with *nacl-fast.js* and 1024-byte messages you can expect to encrypt and
authenticate more than 57000 messages per second on a typical laptop or more than
14000 messages per second on a $170 smartphone, sign about 200 and verify 100
messages per second on a laptop or 60 and 30 messages per second on a smartphone,
authenticate more than 75000 messages per second on a typical laptop or more than
32000 messages per second on a $170 smartphone, sign about 500 and verify 250
messages per second on a laptop or 220 and 130 messages per second on a smartphone,
per CPU core (with Web Workers you can do these operations in parallel),
which is good enough for most applications.

Expand Down
52 changes: 31 additions & 21 deletions nacl-fast.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,11 +7,16 @@
// Implementation derived from TweetNaCl version 20140427.
// See for details: http://tweetnacl.cr.yp.to/

var gf = function(init) {
var i, r = new Float64Array(16);
if (init) for (i = 0; i < init.length; i++) r[i] = init[i];
function gf() {
return [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
}

function gfi(init) {
var r = [], i = 0;
for ( ; i < init.length; i++) r[i] = init[i];
for ( ; i < 16; i++) r[i] = 0;
return r;
};
}

// Pluggable, initialized in high-level API below.
var randombytes = function(/* x, n */) { throw new Error('no PRNG'); };
Expand All @@ -20,13 +25,13 @@ var _0 = new Uint8Array(16);
var _9 = new Uint8Array(32); _9[0] = 9;

var gf0 = gf(),
gf1 = gf([1]),
_121665 = gf([0xdb41, 1]),
D = gf([0x78a3, 0x1359, 0x4dca, 0x75eb, 0xd8ab, 0x4141, 0x0a4d, 0x0070, 0xe898, 0x7779, 0x4079, 0x8cc7, 0xfe73, 0x2b6f, 0x6cee, 0x5203]),
D2 = gf([0xf159, 0x26b2, 0x9b94, 0xebd6, 0xb156, 0x8283, 0x149a, 0x00e0, 0xd130, 0xeef3, 0x80f2, 0x198e, 0xfce7, 0x56df, 0xd9dc, 0x2406]),
X = gf([0xd51a, 0x8f25, 0x2d60, 0xc956, 0xa7b2, 0x9525, 0xc760, 0x692c, 0xdc5c, 0xfdd6, 0xe231, 0xc0a4, 0x53fe, 0xcd6e, 0x36d3, 0x2169]),
Y = gf([0x6658, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666]),
I = gf([0xa0b0, 0x4a0e, 0x1b27, 0xc4ee, 0xe478, 0xad2f, 0x1806, 0x2f43, 0xd7a7, 0x3dfb, 0x0099, 0x2b4d, 0xdf0b, 0x4fc1, 0x2480, 0x2b83]);
gf1 = gfi([1]),
_121665 = gfi([0xdb41, 1]),
D = gfi([0x78a3, 0x1359, 0x4dca, 0x75eb, 0xd8ab, 0x4141, 0x0a4d, 0x0070, 0xe898, 0x7779, 0x4079, 0x8cc7, 0xfe73, 0x2b6f, 0x6cee, 0x5203]),
D2 = gfi([0xf159, 0x26b2, 0x9b94, 0xebd6, 0xb156, 0x8283, 0x149a, 0x00e0, 0xd130, 0xeef3, 0x80f2, 0x198e, 0xfce7, 0x56df, 0xd9dc, 0x2406]),
X = gfi([0xd51a, 0x8f25, 0x2d60, 0xc956, 0xa7b2, 0x9525, 0xc760, 0x692c, 0xdc5c, 0xfdd6, 0xe231, 0xc0a4, 0x53fe, 0xcd6e, 0x36d3, 0x2169]),
Y = gfi([0x6658, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666]),
I = gfi([0xa0b0, 0x4a0e, 0x1b27, 0xc4ee, 0xe478, 0xad2f, 0x1806, 0x2f43, 0xd7a7, 0x3dfb, 0x0099, 0x2b4d, 0xdf0b, 0x4fc1, 0x2480, 0x2b83]);

function ts64(x, i, h, l) {
x[i] = (h >> 24) & 0xff;
Expand Down Expand Up @@ -1323,7 +1328,7 @@ function pow2523(o, i) {

function crypto_scalarmult(q, n, p) {
var z = new Uint8Array(32);
var x = new Float64Array(80), r, i;
var x = [] /* 80 */, r, i;
var a = gf(), b = gf(), c = gf(),
d = gf(), e = gf(), f = gf();
for (i = 0; i < 31; i++) z[i] = n[i];
Expand Down Expand Up @@ -1360,14 +1365,19 @@ function crypto_scalarmult(q, n, p) {
sel25519(a,b,r);
sel25519(c,d,r);
}
var x32 = []; /* 48 */
for (i = 0; i < 16; i++) {
x32[i] = c[i];
x32[i+16] = b[i];
x32[i+32] = d[i];
}
var x16 = []; /* 64 */
for (i = 0; i < 16; i++) {
x[i+16]=a[i];
x[i+32]=c[i];
x[i+48]=b[i];
x[i+64]=d[i];
x16[i] = a[i];
x16[i+16] = c[i];
x16[i+32] = b[i];
x16[i+48] = d[i];
}
var x32 = x.subarray(32);
var x16 = x.subarray(16);
inv25519(x32,x32);
M(x16,x16,x32);
pack25519(q,x16);
Expand Down Expand Up @@ -1932,7 +1942,7 @@ function crypto_sign_keypair(pk, sk, seeded) {
return 0;
}

var L = new Float64Array([0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58, 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x10]);
var L = [0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58, 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x10];

function modL(r, x) {
var carry, i, j, k;
Expand Down Expand Up @@ -1960,7 +1970,7 @@ function modL(r, x) {
}

function reduce(r) {
var x = new Float64Array(64), i;
var x = [] /* 64 */, i;
for (i = 0; i < 64; i++) x[i] = r[i];
for (i = 0; i < 64; i++) r[i] = 0;
modL(r, x);
Expand All @@ -1969,7 +1979,7 @@ function reduce(r) {
// Note: difference from C - smlen returned, not passed as argument.
function crypto_sign(sm, m, n, sk) {
var d = new Uint8Array(64), h = new Uint8Array(64), r = new Uint8Array(64);
var i, j, x = new Float64Array(64);
var i, j, x = [] /* 64 */;
var p = [gf(), gf(), gf(), gf()];

crypto_hash(d, sk, 32);
Expand Down
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