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Code Issues Releases Wiki Activity

Reuse duplicate strings stored in tries

Browse Source 
This is particularly helpful for static network filters
used with filter options causing the same pattern to be
reused across multiple filter instances, i.e. `all` or
`~css`, etc.
This commit is contained in:
Raymond Hill 2020-12-04 07:53:01 -05:00
parent e8e4a1ac74
commit c77f697b4b
No known key found for this signature in database
GPG Key ID: 25E1490B761470C2
2 changed files with 24 additions and 2 deletions
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13
src/js/hntrie.js
View File

@ -141,6 +141,9 @@ const HNTrieContainer = class {
this.buf32[CHAR0_SLOT] = len >>> 1;
this.buf32[CHAR1_SLOT] = this.buf32[CHAR0_SLOT];
this.wasmMemory = null;
this.lastStored = '';
this.lastStoredLen = this.lastStoredIndex = 0;
}
//--------------------------------------------------------------------------
@ -160,6 +163,9 @@ const HNTrieContainer = class {
}
this.buf32[TRIE1_SLOT] = this.buf32[TRIE0_SLOT];
this.buf32[CHAR1_SLOT] = this.buf32[CHAR0_SLOT];
this.lastStored = '';
this.lastStoredLen = this.lastStoredIndex = 0;
}
setNeedle(needle) {
@ -419,6 +425,11 @@ const HNTrieContainer = class {
hn = hn.slice(-255);
n = 255;
}
if ( n === this.lastStoredLen && hn === this.lastStored ) {
return this.lastStoredIndex;
}
this.lastStored = hn;
this.lastStoredLen = n;
if ( (this.buf.length - this.buf32[CHAR1_SLOT]) < n ) {
this.growBuf(0, n);
}
@ -428,7 +439,7 @@ const HNTrieContainer = class {
for ( let i = 0; i < n; i++ ) {
buf8[offset+i] = hn.charCodeAt(i);
}
return offset - this.buf32[CHAR0_SLOT];
return (this.lastStoredIndex = offset - this.buf32[CHAR0_SLOT]);
}
extractHostname(i, n) {

13
src/js/strie.js
View File

@ -147,6 +147,9 @@ const roundToPageSize = v => (v + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
this.extraHandler = extraHandler;
this.textDecoder = null;
this.wasmMemory = null;
this.lastStored = '';
this.lastStoredLen = this.lastStoredIndex = 0;
}
//--------------------------------------------------------------------------
@ -174,6 +177,9 @@ const roundToPageSize = v => (v + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
}
this.buf32[TRIE1_SLOT] = this.buf32[TRIE0_SLOT];
this.buf32[CHAR1_SLOT] = this.buf32[CHAR0_SLOT];
this.lastStored = '';
this.lastStoredLen = this.lastStoredIndex = 0;
}
matches(icell, ai) {
@ -602,6 +608,11 @@ const roundToPageSize = v => (v + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
storeString(s) {
const n = s.length;
if ( n === this.lastStoredLen && s === this.lastStored ) {
return this.lastStoredIndex;
}
this.lastStored = s;
this.lastStoredLen = n;
if ( (this.buf8.length - this.buf32[CHAR1_SLOT]) < n ) {
this.growBuf(0, n);
}
@ -611,7 +622,7 @@ const roundToPageSize = v => (v + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
for ( let i = 0; i < n; i++ ) {
buf8[offset+i] = s.charCodeAt(i);
}
return offset - this.buf32[CHAR0_SLOT];
return (this.lastStoredIndex = offset - this.buf32[CHAR0_SLOT]);
}
extractString(i, n) {