#14944: Compile speed regression -------------------------------------+------------------------------------- Reporter: br1 | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): === 8.4.1 Paper: {{{ Result size of CorePrep = {terms: 3,228, types: 5,423, coercions: 1,008, joins: 3/50} }}} Main: {{{ Result size of Desugar (after optimization) = {terms: 4,564, types: 632,574, coercions: 196, joins: 0/982} Result size of Simplifier iteration=1 = {terms: 6,858, types: 1,023,896, coercions: 86,509, joins: 0/786} Result size of Simplifier iteration=2 = {terms: 4,014, types: 726,796, coercions: 85,137, joins: 1/2} Result size of Specialise = {terms: 9,329, types: 1,646,724, coercions: 168,346, joins: 2/2} Result size of Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) = {terms: 10,431, types: 1,862,310, coercions: 168,346, joins: 1/2} Result size of Simplifier iteration=1 = {terms: 9,648, types: 1,706,501, coercions: 227,811, joins: 2/2} Result size of Simplifier iteration=2 = {terms: 9,349, types: 1,647,213, coercions: 168,353, joins: 2/2} ... Result size of Simplifier = {terms: 9,334, types: 1,647,199, coercions: 168,352, joins: 2/2} -- What happened here?????? Result size of Simplifier iteration=1 = {terms: 110,206, types: 1,818,532, coercions: 379,933, joins: 593/20,293} Result size of Simplifier = {terms: 8,914, types: 1,272,932, coercions: 85,550, joins: 5/203} .... Result size of Demand analysis = {terms: 8,323, types: 1,272,755, coercions: 85,550, joins: 5/6} !!! Demand analysis [Main]: finished in 200.01 milliseconds, allocated 115.130 megabytes *** CoreTidy [Main]: Result size of Tidy Core = {terms: 1,867, types: 166,695, coercions: 1,988, joins: 5/6} }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14944#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler