8179302: Pre-resolve constant pool string entries and cache resolved_reference arrays in CDS archive.
8185924: G1NoteEndOfConcMarkClosure::doHeapRegion() does not do remembered set cleanup work for archive region.
Summary: Shared class' constant pool resolved_references array is cached.
Reviewed-by: coleenp, iklam, tschatzl
Contributed-by: jiangli.zhou@oracle.com, thomas.schatzl@oracle.com

8072061: Automatically determine optimal sizes for the CDS regions
Summary: See new C++ class MetaspaceClosure.
Reviewed-by: coleenp, jiangli, mseledtsov

Merge

8176863: Remove Hashtable::reverse()
Reviewed-by: hseigel, sspitsyn, coleenp

8180048: Interned string and symbol table leak memory during parallel unlinking
Summary: Make appending found dead BasicHashtableEntrys to the free list atomic.
Reviewed-by: ehelin, shade, coleenp

8176593: Throwable::getStackTrace performance regression
Reviewed-by: jiangli, iklam, coleenp, sspitsyn

8150607: Clean up CompactHashtable
Summary: refactored code, and added test cases for serviceability agent
Reviewed-by: jiangli, ccheung

8144940: Broken hash in string table entry in closed/runtime/7158800/BadUtf8.java
Summary: Fix code broken with compact Strings.
Reviewed-by: iklam, thartmann, hseigel, jiangli

8141132: JEP 254: Compact Strings
Summary: Adopt a more space-efficient internal representation for strings.
Reviewed-by: alanb, bdelsart, coleenp, iklam, jiangli, jrose, kevinw, naoto, pliden, roland, smarks, twisti
Contributed-by: Brent Christian <brent.christian@oracle.com>, Vivek Deshpande <vivek.r.deshpande@intel.com>, Tobias Hartmann <tobias.hartmann@oracle.com>, Charlie Hunt <charlie.hunt@oracle.com>, Vladimir Kozlov <vladimir.kozlov@oracle.com>, Roger Riggs <roger.riggs@oracle.com>, Xueming Shen <xueming.shen@oracle.com>, Aleksey Shipilev <aleksey.shipilev@oracle.com>, Sandhya Viswanathan <sandhya.viswanathan@intel.com>

8015086: add interned strings to the shared archive.
Summary: Support saving interned strings in shared CDS archive.
Reviewed-by: coleenp, iklam, pliden

8059510: Compact symbol table layout inside shared archive.
Summary: Use separate compact table for shared symbols.
Reviewed-by: iklam, gziemski, shade, sla, jrose

8056084: Refactor Hashtable to allow implementations without rehashing support
Reviewed-by: gziemski, jmasa, brutisso, coleenp, tschatzl

8038654: Separate SymbolTable and StringTable code
Summary: Refactor stringTable class out of symbolTable, making sure all includes are minimal set and are sorted.
Reviewed-by: coleenp, stefank