# HG changeset patch
# User Adam Gashlin <agashlin@mozilla.com>
# Date 1520380160 28800
# Node ID 660d7b66d239b2d89f0b1a4e0f9d7a866ad3af56
# Parent  ba5bfdf2b72b21ab2bfcd1a67c54153c2dd3d85a
Bug 1434513 - Adjust bsdiff heuristics. r=glandium

diff --git a/other-licenses/bsdiff/bsdiff.c b/other-licenses/bsdiff/bsdiff.c
--- a/other-licenses/bsdiff/bsdiff.c
+++ b/other-licenses/bsdiff/bsdiff.c
@@ -299,39 +299,39 @@ int main(int argc,char *argv[])
 					0,oldsize,&pos);
 
 			for(;scsc<scan+len;scsc++)
 			if((scsc+lastoffset<oldsize) &&
 				(old[scsc+lastoffset] == newbuf[scsc]))
 				oldscore++;
 
 			if(((len==oldscore) && (len!=0)) || 
-				(len>oldscore+8)) break;
+				(len>oldscore+10)) break;
 
 			if((scan+lastoffset<oldsize) &&
 				(old[scan+lastoffset] == newbuf[scan]))
 				oldscore--;
 		};
 
 		if((len!=oldscore) || (scan==newsize)) {
 			MBSPatchTriple triple;
 
 			s=0;Sf=0;lenf=0;
 			for(i=0;(lastscan+i<scan)&&(lastpos+i<oldsize);) {
 				if(old[lastpos+i]==newbuf[lastscan+i]) s++;
 				i++;
-				if(s*2-i>Sf*2-lenf) { Sf=s; lenf=i; };
+				if(s*3-i*2>Sf*3-lenf*2) { Sf=s; lenf=i; };
 			};
 
 			lenb=0;
 			if(scan<newsize) {
 				s=0;Sb=0;
 				for(i=1;(scan>=lastscan+i)&&(pos>=i);i++) {
 					if(old[pos-i]==newbuf[scan-i]) s++;
-					if(s*2-i>Sb*2-lenb) { Sb=s; lenb=i; };
+					if(s*3-i*2>Sb*3-lenb*2) { Sb=s; lenb=i; };
 				};
 			};
 
 			if(lastscan+lenf>scan-lenb) {
 				overlap=(lastscan+lenf)-(scan-lenb);
 				s=0;Ss=0;lens=0;
 				for(i=0;i<overlap;i++) {
 					if(newbuf[lastscan+lenf-overlap+i]==