Profiling results ----------------- Total cpu time observed: 18452ms (out of 18864ms) Number of samples taken: 75 (once every 246ms) ======================================================================= Caller Idx Total Self Name+src Local% ms(pct) ms(pct) Callee ======================================================================= ??? [34] 100.0% [1] 17606(95.4%) 0(0.0%) profile-thunk14 ...t/pkgs/profile-lib/main.rkt:9:0 run [10] 100.0% ----------------------------------------------------------------------- ??? [34] 100.0% [2] 9688(52.5%) 0(0.0%) run-improve58 ...ock/herbie/src/mainloop.rkt:242:0 get-final-combination [11] 52.2% for-loop [12] 36.8% finalize-table! [14] 8.9% loop [41] 2.0% ----------------------------------------------------------------------- ??? [34] 100.0% [3] 3154(17.1%) 0(0.0%) simplify ...lock/herbie/src/core/simplify.rkt:39:0 simplify-expr [13] 59.8% for-loop [15] 20.4% iterate-egraph!5 [19] 19.8% ----------------------------------------------------------------------- copying-mergesort [51] 100.0% [4] 1570(8.5%) 0(0.0%) jloop ...et/collects/racket/private/sort.rkt:85:19 ??? [64] 100.0% ----------------------------------------------------------------------- loop [77] 100.0% [5] 442(2.4%) 0(0.0%) ??? ...ket/collects/racket/private/list.rkt:323:18 hash-ref! [68] 100.0% ----------------------------------------------------------------------- hash-ref! [68] 100.0% [6] 222(1.2%) 0(0.0%) f6 ...et/collects/racket/match/compiler.rkt:499:40 map [63] 100.0% ----------------------------------------------------------------------- hash-ref! [68] 100.0% [7] 220(1.2%) 0(0.0%) simplify ...atlock/herbie/src/core/reduce.rkt:18:0 parse-loop12 [71] 100.0% ----------------------------------------------------------------------- hash-ref! [68] 100.0% [8] 220(1.2%) 0(0.0%) ??? .../ztatlock/herbie/src/core/taylor.rkt:285:26 for-loop [16] 100.0% ----------------------------------------------------------------------- hash-ref! [68] 100.0% [9] 192(1.0%) 0(0.0%) ??? /home/ztatlock/herbie/src/programs.rkt:197:5 loop [77] 100.0% ----------------------------------------------------------------------- profile-thunk14 [1] 100.0% [10] 17606(95.4%) 0(0.0%) run ...share/racket/pkgs/profile-lib/main.rkt:31:2 ??? [34] 100.0% ----------------------------------------------------------------------- run-improve58 [2] 100.0% [11] 5060(27.4%) 0(0.0%) get-final-combination ...ie/src/mainloop.rkt:269:0 split-table [17] 100.0% ----------------------------------------------------------------------- run-improve58 [2] 100.0% [12] 3570(19.3%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:253:8 run-iter! [18] 100.0% ----------------------------------------------------------------------- completely-simplify-alt [82] 9.7% simplify [3] 90.3% [13] 2088(11.3%) 0(0.0%) simplify-expr ...herbie/src/core/simplify.rkt:68:0 iterate-egraph!5 [19] 100.0% ----------------------------------------------------------------------- run-improve58 [2] 100.0% [14] 866(4.7%) 0(0.0%) finalize-table! ...k/herbie/src/mainloop.rkt:264:0 post-process [20] 100.0% ----------------------------------------------------------------------- simplify [3] 100.0% [15] 644(3.5%) 0(0.0%) for-loop ...ock/herbie/src/core/simplify.rkt:61:12 iterate-egraph!5 [19] 100.0% ----------------------------------------------------------------------- ??? [8] 100.0% [16] 220(1.2%) 0(0.0%) for-loop ...lock/herbie/src/core/taylor.rkt:285:52 ??? [21] 100.0% ----------------------------------------------------------------------- get-final-combination [11] 100.0% [17] 5060(27.4%) 0(0.0%) split-table .../ztatlock/herbie/src/glue.rkt:171:0 infer-splitpoints4 [22] 100.0% ----------------------------------------------------------------------- for-loop [12] 100.0% [18] 3570(19.3%) 0(0.0%) run-iter! ...tatlock/herbie/src/mainloop.rkt:223:0 simplify! [24] 88.3% localize-error [25] 11.7% ----------------------------------------------------------------------- simplify [3] 18.6% for-loop [15] 19.2% simplify-expr [13] 62.2% [19] 3356(18.2%) 0(0.0%) iterate-egraph!5 ...bie/src/core/simplify.rkt:95:0 one-iter [23] 100.0% ----------------------------------------------------------------------- finalize-table! [14] 100.0% [20] 866(4.7%) 0(0.0%) post-process .../ztatlock/herbie/src/glue.rkt:95:0 ??? [26] 25.6% localize-error [25] 25.6% for-loop [27] 25.4% loop [77] 23.3% ----------------------------------------------------------------------- for-loop [16] 100.0% [21] 220(1.2%) 0(0.0%) ??? .../ztatlock/herbie/src/core/taylor.rkt:288:19 hash-ref! [68] 100.0% ----------------------------------------------------------------------- split-table [17] 100.0% [22] 5060(27.4%) 0(0.0%) infer-splitpoints4 ...ie/src/core/regimes.rkt:19:0 option-on-expr [28] 83.8% loop [77] 16.2% ----------------------------------------------------------------------- iterate-egraph!5 [19] 100.0% [23] 3356(18.2%) 202(1.1%) one-iter ...ock/herbie/src/core/simplify.rkt:106:0 loop [30] 50.8% for-loop [31] 36.6% apply-match [36] 6.6% ----------------------------------------------------------------------- run-iter! [18] 100.0% [24] 3154(17.1%) 0(0.0%) simplify! ...tatlock/herbie/src/mainloop.rkt:162:0 for-loop [29] 100.0% ----------------------------------------------------------------------- post-process [20] 34.8% run-iter! [18] 65.2% [25] 638(3.5%) 0(0.0%) localize-error ...erbie/src/core/localize.rkt:47:0 hash-ref! [68] 100.0% ----------------------------------------------------------------------- post-process [20] 100.0% [26] 222(1.2%) 0(0.0%) ??? ...contract/private/arrow-val-first.rkt:357:18 for-loop [32] 100.0% ----------------------------------------------------------------------- post-process [20] 100.0% [27] 220(1.2%) 0(0.0%) for-loop /home/ztatlock/herbie/src/glue.rkt:119:17 append-map [33] 100.0% ----------------------------------------------------------------------- loop [77] 16.2% infer-splitpoints4 [22] 83.8% [28] 5060(27.4%) 0(0.0%) option-on-expr ...erbie/src/core/regimes.rkt:106:0 sort-context-on-expr [35] 95.7% pick-errors [38] 4.3% ----------------------------------------------------------------------- simplify! [24] 100.0% [29] 3154(17.1%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:166:6 ??? [34] 100.0% ----------------------------------------------------------------------- one-iter [23] 100.0% [30] 1706(9.2%) 0(0.0%) loop ...cket/collects/racket/private/map.rkt:53:19 apply-match [36] 100.0% ----------------------------------------------------------------------- for-loop [31] 50.0% one-iter [23] 50.0% [31] 1228(6.7%) 202(1.1%) for-loop ...ck/herbie/src/core/simplify.rkt:116:12 for-loop [31] 50.0% match-e [43] 33.6% ??? [40] 8.2% ----------------------------------------------------------------------- ??? [26] 100.0% [32] 222(1.2%) 0(0.0%) for-loop ...ock/herbie/src/core/alt-table.rkt:51:2 atab-add-altn [37] 100.0% ----------------------------------------------------------------------- for-loop [27] 100.0% [33] 220(1.2%) 0(0.0%) append-map ...acket/collects/racket/list.rkt:565:2 taylor-alt [39] 100.0% ----------------------------------------------------------------------- for-loop [29] 6.3% run [10] 45.4% [34] 18452(100.0%) 0(0.0%) ??? ...lects/racket/private/more-scheme.rkt:261:28 profile-thunk14 [1] 45.4% loop [41] 24.4% run-improve58 [2] 24.0% simplify [3] 6.3% ----------------------------------------------------------------------- option-on-expr [28] 100.0% [35] 4840(26.2%) 0(0.0%) sort-context-on-expr ...herbie/src/points.rkt:50:0 sort [42] 100.0% ----------------------------------------------------------------------- one-iter [23] 11.4% loop [30] 88.6% [36] 1926(10.4%) 0(0.0%) apply-match .../herbie/src/core/simplify.rkt:122:2 loop! [81] 45.8% match-e [43] 33.3% substitute-e [48] 10.5% for-loop [49] 10.4% ----------------------------------------------------------------------- for-loop [32] 100.0% [37] 222(1.2%) 0(0.0%) atab-add-altn ...rbie/src/core/alt-table.rkt:208:0 best-and-tied-at-points [44] 100.0% ----------------------------------------------------------------------- option-on-expr [28] 100.0% [38] 220(1.2%) 0(0.0%) pick-errors ...k/herbie/src/core/regimes.rkt:173:0 for-loop [45] 100.0% ----------------------------------------------------------------------- append-map [33] 100.0% [39] 220(1.2%) 0(0.0%) taylor-alt ...e/ztatlock/herbie/src/glue.rkt:142:0 for-loop [46] 100.0% ----------------------------------------------------------------------- for-loop [31] 100.0% [40] 202(1.1%) 0(0.0%) ??? /home/ztatlock/herbie/src/core/ematch.rkt:50:5 for-loop [47] 100.0% ----------------------------------------------------------------------- run-improve58 [2] 2.1% ??? [34] 97.9% [41] 8956(48.5%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:122:2 loop [50] 54.9% make-exacts* [56] 45.1% ----------------------------------------------------------------------- sort-context-on-expr [35] 100.0% [42] 4840(26.2%) 0(0.0%) sort ...ket/collects/racket/private/sort.rkt:213:0 copying-mergesort [51] 68.9% loop [57] 26.5% ??? [64] 4.6% ----------------------------------------------------------------------- for-loop [59] 14.3% apply-match [36] 36.3% for-loop [31] 49.4% [43] 1466(7.9%) 202(1.1%) match-e ...tatlock/herbie/src/core/ematch.rkt:46:0 for-loop [52] 79.4% loop [77] 6.8% ----------------------------------------------------------------------- atab-add-altn [37] 100.0% [44] 222(1.2%) 0(0.0%) best-and-tied-at-points ...ore/alt-table.rkt:122:0 errors [53] 100.0% ----------------------------------------------------------------------- pick-errors [38] 100.0% [45] 220(1.2%) 0(0.0%) for-loop ...lock/herbie/src/core/regimes.rkt:176:4 eval-prog [67] 100.0% ----------------------------------------------------------------------- taylor-alt [39] 100.0% [46] 220(1.2%) 0(0.0%) for-loop /home/ztatlock/herbie/src/glue.rkt:144:2 location-do [54] 100.0% ----------------------------------------------------------------------- ??? [40] 100.0% [47] 202(1.1%) 202(1.1%) for-loop ...atlock/herbie/src/core/ematch.rkt:51:7 ----------------------------------------------------------------------- apply-match [36] 100.0% [48] 202(1.1%) 0(0.0%) substitute-e ...ck/herbie/src/core/ematch.rkt:71:0 mk-enode! [55] 100.0% ----------------------------------------------------------------------- apply-match [36] 100.0% [49] 200(1.1%) 0(0.0%) for-loop ...ck/herbie/src/core/simplify.rkt:136:10 loop! [81] 100.0% ----------------------------------------------------------------------- loop [41] 100.0% [50] 4914(26.6%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:93:2 make-exacts* [56] 54.7% loop [58] 32.3% eval-prog [67] 8.3% loop [60] 4.8% ----------------------------------------------------------------------- copying-mergesort [51] 44.9% sort [42] 55.1% [51] 3334(18.1%) 0(0.0%) copying-mergesort .../racket/private/sort.rkt:91:4 copying-mergesort [51] 44.9% loop [57] 43.3% jloop [4] 11.8% ----------------------------------------------------------------------- match-e [43] 100.0% [52] 1264(6.9%) 644(3.5%) for-loop ...tlock/herbie/src/core/ematch.rkt:59:11 for-loop [59] 24.5% curry* [61] 17.4% loop [77] 15.8% ----------------------------------------------------------------------- best-and-tied-at-points [44] 100.0% [53] 222(1.2%) 0(0.0%) errors /home/ztatlock/herbie/src/points.rkt:144:0 eval-prog [67] 100.0% ----------------------------------------------------------------------- for-loop [46] 100.0% [54] 220(1.2%) 0(0.0%) location-do ...tlock/herbie/src/programs.rkt:129:0 approximate9 [62] 100.0% ----------------------------------------------------------------------- substitute-e [48] 100.0% [55] 202(1.1%) 202(1.1%) mk-enode! ...lock/herbie/src/core/egraph.rkt:101:0 ----------------------------------------------------------------------- loop [50] 39.9% loop [41] 60.1% [56] 6728(36.5%) 0(0.0%) make-exacts* ...tatlock/herbie/src/points.rkt:80:0 map [63] 51.8% loop [77] 48.2% ----------------------------------------------------------------------- sort [42] 42.1% copying-mergesort [51] 57.9% [57] 3048(16.5%) 0(0.0%) loop ...cket/collects/racket/private/sort.rkt:64:8 ??? [64] 100.0% ----------------------------------------------------------------------- loop [50] 100.0% [58] 1586(8.6%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:83:4 map [63] 100.0% ----------------------------------------------------------------------- for-loop [52] 100.0% [59] 420(2.3%) 0(0.0%) for-loop ...tlock/herbie/src/core/ematch.rkt:65:37 match-e [43] 100.0% ----------------------------------------------------------------------- loop [50] 0.1% loop [60] 99.9% [60] 234(1.3%) 234(1.3%) loop /home/ztatlock/herbie/src/points.rkt:72:2 loop [60] 99.9% ----------------------------------------------------------------------- for-loop [52] 100.0% [61] 220(1.2%) 0(0.0%) curry* ...racket/collects/racket/function.rkt:44:2 procedure-arity [65] 100.0% ----------------------------------------------------------------------- location-do [54] 100.0% [62] 220(1.2%) 0(0.0%) approximate9 ...ck/herbie/src/core/taylor.rkt:11:0 loop [66] 100.0% ----------------------------------------------------------------------- f6 [6] 4.2% loop [58] 29.9% make-exacts* [56] 65.9% [63] 5296(28.7%) 0(0.0%) map ...acket/collects/racket/private/map.rkt:21:13 loop [77] 100.0% ----------------------------------------------------------------------- sort [42] 4.6% jloop [4] 32.4% loop [57] 63.0% [64] 4840(26.2%) 0(0.0%) ??? /home/ztatlock/herbie/src/points.rkt:52:27 eval-prog [67] 90.9% ??? [80] 9.1% ----------------------------------------------------------------------- curry* [61] 100.0% [65] 220(1.2%) 220(1.2%) procedure-arity ...ket/private/norm-arity.rkt:7:27 ----------------------------------------------------------------------- approximate9 [62] 100.0% [66] 220(1.2%) 0(0.0%) loop ...e/ztatlock/herbie/src/core/taylor.rkt:82:4 hash-ref! [68] 100.0% ----------------------------------------------------------------------- for-loop [45] 4.2% errors [53] 4.2% loop [50] 7.8% ??? [64] 83.8% [67] 5248(28.4%) 4398(23.8%) eval-prog ...tatlock/herbie/src/programs.rkt:162:0 hash-ref! [68] 7.8% go [69] 4.2% new-lambda [70] 4.2% ----------------------------------------------------------------------- ??? [21] 4.3% ??? [76] 4.3% ??? [75] 4.3% loop [66] 4.3% loop [77] 10.1% eval-prog [67] 22.1% ??? [5] 22.7% localize-error [25] 27.7% [68] 1266(6.9%) 0(0.0%) hash-ref! ...racket/private/more-scheme.rkt:373:13 parse-loop12 [71] 46.9% bigfloat-hash [72] 22.1% ??? [9] 10.1% ??? [75] 4.3% ??? [76] 4.3% ??? [8] 4.3% simplify [7] 4.3% f6 [6] 3.5% ----------------------------------------------------------------------- eval-prog [67] 100.0% [69] 222(1.2%) 0(0.0%) go .../collects/racket/private/qq-and-or.rkt:50:20 loop [73] 100.0% ----------------------------------------------------------------------- eval-prog [67] 100.0% [70] 220(1.2%) 0(0.0%) new-lambda ...ollects/racket/private/kw.rkt:631:11 loop [74] 100.0% ----------------------------------------------------------------------- simplify [7] 25.6% hash-ref! [68] 74.4% [71] 858(4.6%) 220(1.2%) parse-loop12 ...s/racket/match/compiler.rkt:410:15 loop [77] 61.5% loop [79] 12.8% ----------------------------------------------------------------------- hash-ref! [68] 100.0% [72] 408(2.2%) 0(0.0%) bigfloat-hash ...h/private/bigfloat/mpfr.rkt:165:0 bfcanonicalize [78] 100.0% ----------------------------------------------------------------------- loop [73] 50.0% go [69] 50.0% [73] 222(1.2%) 222(1.2%) loop ...llects/racket/private/qq-and-or.rkt:101:61 loop [73] 50.0% ----------------------------------------------------------------------- new-lambda [70] 100.0% [74] 220(1.2%) 220(1.2%) loop .../collects/racket/private/stxcase.rkt:112:7 ----------------------------------------------------------------------- hash-ref! [68] 100.0% [75] 220(1.2%) 0(0.0%) ??? ...e/ztatlock/herbie/src/core/taylor.rkt:63:15 hash-ref! [68] 100.0% ----------------------------------------------------------------------- hash-ref! [68] 100.0% [76] 220(1.2%) 0(0.0%) ??? ...e/ztatlock/herbie/src/core/taylor.rkt:42:15 hash-ref! [68] 100.0% ----------------------------------------------------------------------- make-exacts* [56] 0.1% map [63] 1.5% ??? [9] 1.6% for-loop [52] 1.7% match-e [43] 1.7% post-process [20] 1.7% parse-loop12 [71] 2.1% loop! [81] 3.7% infer-splitpoints4 [22] 7.0% loop [77] 78.9% [77] 11646(63.1%) 422(2.3%) loop ...cket/collects/racket/private/map.rkt:26:19 loop [77] 78.9% option-on-expr [28] 7.0% loop! [81] 3.7% ??? [5] 2.0% completely-simplify-alt [82] 1.7% foldl [83] 1.7% hash-ref! [68] 1.6% ??? [80] 1.5% ??? [94] 0.1% ->flonum [85] 0.0% ----------------------------------------------------------------------- bigfloat-hash [72] 100.0% [78] 408(2.2%) 408(2.2%) bfcanonicalize .../private/bigfloat/mpfr.rkt:155:0 ----------------------------------------------------------------------- parse-loop12 [71] 1.9% loop [79] 98.1% [79] 220(1.2%) 0(0.0%) loop ...cket/collects/racket/private/map.rkt:37:19 loop [79] 98.1% ->flonum [85] 1.9% ----------------------------------------------------------------------- ??? [64] 5.4% loop [77] 94.6% [80] 8258(44.8%) 2026(11.0%) ??? /home/ztatlock/herbie/src/programs.rkt:168:4 ??? [84] 50.5% real->bigfloat [86] 11.1% ??? [97] 5.7% ->flonum [85] 5.4% ...e/case-arrow.rkt:150:50 [88] 2.7% ----------------------------------------------------------------------- for-loop [49] 9.2% apply-match [36] 40.8% loop [77] 50.0% [81] 1082(5.9%) 440(2.4%) loop! .../ztatlock/herbie/src/core/enode.rkt:163:2 loop [77] 50.0% set [87] 20.4% update-en-expr [89] 9.2% ----------------------------------------------------------------------- loop [77] 100.0% [82] 202(1.1%) 0(0.0%) completely-simplify-alt ...erbie/src/glue.rkt:87:0 simplify-expr [13] 100.0% ----------------------------------------------------------------------- loop [77] 100.0% [83] 200(1.1%) 200(1.1%) foldl ...et/collects/racket/private/list.rkt:229:4 ----------------------------------------------------------------------- ??? [80] 100.0% [84] 4174(22.6%) 0(0.0%) ??? ...acket/collects/racket/private/kw.rkt:400:14 ??? [94] 33.6% bf* [92] 31.6% bffma [90] 29.1% ...ow-val-first.rkt:357:18 [93] 5.6% ----------------------------------------------------------------------- loop [79] 23.5% loop [77] 29.4% ??? [80] 47.1% [85] 938(5.1%) 498(2.7%) ->flonum ...ock/herbie/src/syntax/syntax.rkt:224:0 ??? [91] 23.5% ??? [99] 23.5% ----------------------------------------------------------------------- ??? [80] 100.0% [86] 916(5.0%) 474(2.6%) real->bigfloat .../private/bigfloat/mpfr.rkt:451:0 ??? [100] 48.3% ----------------------------------------------------------------------- loop! [81] 100.0% [87] 442(2.4%) 442(2.4%) set ...collects/racket/private/set-types.rkt:982:0 ----------------------------------------------------------------------- ??? [80] 100.0% [88] 226(1.2%) 226(1.2%) ...e/case-arrow.rkt:150:50 (unknown source) ----------------------------------------------------------------------- loop! [81] 100.0% [89] 200(1.1%) 200(1.1%) update-en-expr ...herbie/src/core/egraph.rkt:211:0 ----------------------------------------------------------------------- ??? [84] 100.0% [90] 1216(6.6%) 0(0.0%) bffma ...atlock/herbie/src/syntax/syntax.rkt:122:0 bf* [92] 79.3% ...ow-val-first.rkt:357:18 [93] 20.7% ----------------------------------------------------------------------- ->flonum [85] 100.0% [91] 220(1.2%) 220(1.2%) ??? /home/ztatlock/herbie/src/config.rkt:29:0 ----------------------------------------------------------------------- bffma [90] 42.2% ??? [84] 57.8% [92] 2284(12.4%) 0(0.0%) bf* ...ath/private/bigfloat/bigfloat-mpfr.rkt:95:0 ??? [94] 100.0% ----------------------------------------------------------------------- ??? [84] 48.1% bffma [90] 51.9% [93] 486(2.6%) 0(0.0%) ...ow-val-first.rkt:357:18 (unknown source) ??? [95] 100.0% ----------------------------------------------------------------------- loop [77] 10.2% ??? [84] 34.2% bf* [92] 55.6% [94] 4106(22.3%) 240(1.3%) ??? ...-racket/utils/simple-result-arrow.rkt:26:12 bfadd [96] 76.7% ??? [99] 12.0% bfsqr [98] 5.4% ----------------------------------------------------------------------- ...ow-val-first.rkt:357:18 [93]100.0% [95] 486(2.6%) 0(0.0%) ??? ...cts/racket/contract/private/list.rkt:187:10 ??? [97] 100.0% ----------------------------------------------------------------------- ??? [94] 100.0% [96] 3150(17.1%) 2698(14.6%) bfadd ...-lib/math/private/bigfloat/mpfr.rkt:819:4 ??? [100] 14.3% ----------------------------------------------------------------------- ??? [80] 49.4% ??? [95] 50.6% [97] 960(5.2%) 0(0.0%) ??? ...ects/racket/contract/private/guts.rkt:638:8 ??? [99] 100.0% ----------------------------------------------------------------------- ??? [94] 100.0% [98] 222(1.2%) 0(0.0%) bfsqr ...-lib/math/private/bigfloat/mpfr.rkt:616:4 ??? [100] 100.0% ----------------------------------------------------------------------- ->flonum [85] 13.1% ??? [94] 29.5% ??? [97] 57.3% [99] 1674(9.1%) 926(5.0%) ??? ...tract/private/arrow-higher-order.rkt:373:33 ??? [101] 44.7% ----------------------------------------------------------------------- bfsqr [98] 19.9% real->bigfloat [86] 39.6% bfadd [96] 40.5% [100] 1116(6.0%) 1116(6.0%) ??? .../share/racket/collects/ffi/unsafe.rkt:861:4 ----------------------------------------------------------------------- ??? [99] 100.0% [101] 748(4.1%) 506(2.7%) ??? ...llects/racket/contract/combinator.rkt:178:4 any-wrap/traverse [102] 32.4% ----------------------------------------------------------------------- ??? [101] 100.0% [102] 242(1.3%) 242(1.3%) any-wrap/traverse ...cket/utils/any-wrap.rkt:106:2 -----------------------------------------------------------------------